Space Invaders · deepseek-v4.1-flash

Let me build a Space Invaders game in a single index.html file. Let me plan the implementation.

Key features:
- Canvas rendering with procedural graphics
- Player cannon movement (Left/Right, A/D), fire (Space)
- Grid of aliens moving horizontally, reversing at edges, descending
- Aliens fire toward player
- Player shots remove aliens, increase score once
- Destructible bunkers, hits remove material persistently, gaps let shots pass
- 3 lives, enemy shots cost life with brief invulnerability
- Game Over when aliens reach player zone or zero lives, win when cleared
- Restart restores everything
- Bound projectile lifetime and fire rate

Let me write a solid implementation. I'll use a pixel-based approach for aliens and bunkers for good visuals.

For bunkers: use a grid of blocks (e.g., 12x8 cells each). Store as 2D arrays. On hit, remove a small pattern of cells. Collision check against cell grid.

Let me write the code.

Canvas dimensions: 800x600 maybe. Let me use 960x720? Keep it 800x600.

Let me design:

- W=800, H=600
- Player: width 40, height 24, y = H-50
- Aliens: 11 columns x 5 rows. Each alien 32x24. Grid starts x=100, y=80, spacing x=48, y=40.
- Alien movement: whole formation moves. Speed increases as fewer aliens.
- Aliens fire: random from bottom-most alien in a column.
- Bunkers: 4 bunkers, each 60 wide, 40 tall, cell size 5 -> 12x8.
- Bullets: player bullet speed 8 up, enemy bullet speed 4 down. Lifetime e.g. player 90 frames, enemy 200.
- Fire rate: player cooldown ~250ms.

Let me implement with requestAnimationFrame and delta time or fixed step. I'll use fixed timestep accumulator for deterministic behavior.

Let me write the HTML.

Procedural graphics: draw aliens with pixel patterns. I'll define each alien type as a bitmap string of pixels.

Let me define alien sprites as 2D arrays or strings for 11x8. Use two animation frames.

Let me write it.

Alien types by row. Classic: squid (top), crab (middle), octopus (bottom). I'll define pixel patterns.

Actually let me keep it simpler but nice: define sprites as arrays of strings where '1' is pixel.

Squid 8x8:
```
..1111..
.111111.
11111111
11.11.11
11111111
..1..1..
.1.11.1.
1.1..1.1
```
Hmm let me just use classic patterns.

Octopus (12x8):
```
..111111..
.11111111.
1111111111
11..11..11
1111111111
...1..1...
..1.11.1..
.1.1..1.1.
```
That's 10 wide.

Crab (11x8):
```
..1.....1..
...1...1...
..1111111..
.11.111.11.
11111111111
1.1111111.1
1.1.....1.1
...11.11...
```
11 wide.

Squid (8x8):
```
...11...
..1111..
.111111.
11.11.11
11111111
..1..1..
.1.11.1.
.1....1.
```

I'll scale pixels by a factor, e.g., 3 for octopus (10*3=30 wide), crab 11*3=33, squid 8*3=24. To keep uniform cell size, use scale 3 and center within cell of 33x24. Cell width 33, height 24? Let's set alien cell 36x28 and scale 3.

Actually simpler: define all sprites on an 11x8 grid by padding squid. Let me just render each sprite centered in its cell.

Let me choose cell width = 36, cell height=28, scale=3. Sprite heights 8*3=24 fits in 28.

Formation: 11 cols -> width 11*36=396. Start x = (800-396)/2 = 202. Hmm let's set cols=9 -> 324, x=(800-324)/2=238. Rows=5.

Let me use cols=10, spacing 40, sprite scale 3. cell width 40.

I'll just implement.

Movement: formation offset x moves by speed*dt. Bounds: if any alien touches left/right edge, reverse and descend. Need to track formation x offset and y offset.

Let me store aliens with grid positions and compute pixel positions from formation offset. That's cleanest. Each alien: col,row, alive. Position = baseX + col*cellW + formX, baseY + row*cellH + formY.

On edge: compute min/max alive column, check position.

Let me implement:

```
minX = baseX + formX
maxX = baseX + formX + (cols-1)*cellW + spriteW
```

Actually simpler: use formation offset in pixels; when leftmost alive alien x < margin or rightmost > W-margin, reverse direction and formY += descent.

For firing enemies: pick a random column that has alive aliens, fire from bottom-most.

Bunkers: represent as array of {x,y,cols,rows,cells: Uint8Array}. cellSize 6, cols 10, rows 7 -> 60x42. Place 4 bunkers evenly.

Bunker collision: on bullet, check bounding box against bunker, then check cells. When hit, remove a blast pattern of cells around impact.

Let me implement damage: remove cells in a circle/rect of ~2-3 cell radius.

For player bullet vs aliens: AABB.

Enemy bullets vs bunkers, player bullets vs bunkers.

Player hit: enemy bullet AABB with player, if not invulnerable -> lose life, set invuln timer, clear enemy bullets maybe. Respawn position center.

Aliens reaching player zone: if alien bottom >= player.y -> game over.

Win: all aliens dead -> win state.

Restart: reset everything.

Let me write the code now.

I'll use fixed timestep dt in seconds. Speeds in px/sec.

Player speed 300 px/s.
Alien base speed 40 px/s, increase with fewer aliens: speed = 30 + (totalAlive fraction?) Actually speed = 20 + (1 - alive/total) * 120 plus level? Keep.

Alien fire rate: every 0.8-1.5s pick random column.

Player fire cooldown 0.25s. Bullet lifetime: player 2s, enemy 4s.

Let me code.

I'll write procedural rendering for cannon too.

Let me write the file.

For the display of controls, put text above canvas or in HTML.

Let me implement states: 'ready'? Start immediately. 'playing', 'gameover', 'win'.

Let me write it all.

I'll be careful with collision of bullet vs bunker cells.

Bunker cells stored row-major. Cell size 6. Hit test point: for bullet at (x,y), find cell col=floor((x-bx)/cs), row=floor((y-by)/cs). If inside and cell alive -> destroy. For damage pattern, remove cells within radius 2.

Also for bullet AABB we check the bullet's tip.

Let me write now.

I'll create the HTML with a canvas and an info bar.

Code:

```html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Space Invaders</title>
<style>...</style>
</head>
<body>
<div id="wrap">
  <div id="hud">...</div>
  <canvas id="game" width="800" height="600"></canvas>
  <div id="controls">...</div>
</div>
<script>...</script>
</body>
</html>
```

Let me write the JS carefully.

Pixel sprite drawing function: drawSprite(ctx, sprite, x, y, scale, color). sprite is array of strings.

Let me finalize sprites:

squid (top row) 8x8:
```
"...11...",
"..1111..",
".111111.",
"11.11.11",
"11111111",
"..1..1..",
".1.11.1.",
"1.1..1.1"
```
Frame 2 same but frame variant. I'll just alternate two frames with slight changes.

octopus 12x8:
```
"..111111..",
".11111111.",
"1111111111",
"11..11..11",
"1111111111",
"...1..1...",
"..1.11.1..",
".1.1..1.1."
```
Hmm 10 wide. Fine.

crab 11x8:
```
"..1.....1..",
"...1...1...",
"..1111111..",
".11.111.11.",
"11111111111",
"1.1111111.1",
"1.1.....1.1",
"...11.11..."
```

Row assignment: rows 0 = squid, 1-2 = crab, 3-4 = octopus.

For collision, each alien has width = sprite width*scale, height = 8*scale. I'll compute per alien.

Let me define getAliensByRow.

Actually simpler: cell size = 40x32. Sprite scale=3. Center sprite in cell: offsetX=(40-w)/2, offsetY=(32-24)/2=4.

Alien hitbox = the cell basically (40x32) or sprite bounds. Use sprite bounds for accuracy.

Let me just use cell bounds for hitbox, it's fine and generous.

Now let me write the code.

I'll track `formX` to move, `formY` for descent. Base at x0=60, y0=70.

cols=10, cellW=40 -> width 400. x0=(800-400)/2=200.

Aliens array of {row,col,alive,sprite}. position px = x0 + col*cellW + formX; py = y0 + row*cellH + formY.

Edge detection: for alive aliens compute min px and max px+cellW.

Descend step: 16px.

Alien bullets: choose random alive column, bottom-most alien. Bullet spawns at center bottom.

Now let me code the whole thing.

I'll also add particle effects? Maybe simple. Keep minimal to save time.

Let me write.

For "brief protection from repeated damage": invuln 2 seconds, flicker.

Game over on zero lives or aliens reach player zone. Win on clearing.

Restart button and R key.

Let me write the file now.

I'll write with a game loop using requestAnimationFrame and dt clamped.

Let me produce the code.

```js
const canvas = document.getElementById('game');
const ctx = canvas.getContext('2d');
const W = canvas.width, H = canvas.height;

const COLORS = {...};

// Sprite definitions
const SPRITES = {
  squid: [[...],[...]],
  crab: [...],
  octo: [...]
};
```

I'll create function.

Let me just write it out fully.

Player render: a cannon shape drawn with rects - base and barrel. Simple pixel art:
```
....11....
...1111...
...1111...
.11111111.
1111111111
1111111111
```
10x6 scale 4 -> 40x24. Good.

Also a small turret on top.

Bullet: 4x12 rect with glow.

Let me write.

I'll now write the entire index.html.

For bunker rendering, iterate cells and fill rects.

Let me be careful about the fixed timestep. I'll use accumulator:

```js
let last = performance.now();
function loop(now){
  let dt = (now-last)/1000; last=now;
  if(dt>0.05) dt=0.05;
  update(dt);
  render();
  requestAnimationFrame(loop);
}
```

dt in seconds.

Player bullet cooldown variable.

Enemy fire timer.

Collisions each frame.

Alright, writing.

Let me define global game object reset function.

I'll write now, then test.

Bunker damage: When a bullet hits a cell, remove cells within a blast radius. For player bullets traveling up hit the bottom of the bunker first. Enemy bullets hit top. Good.

Implementation of checkBunkerHit(bullet, fromPlayer):
- iterate bunkers, check if bullet tip within bunker bounds
- find cell at impact; if alive, apply damage, deactivate bullet
Actually we should check the cell at the bullet's position. But bullet moves fast; use swept check by sampling a few points along its path this frame. To keep simple, check current position and maybe previous. Since bullet speed 8px/frame at 60fps... dt could be large. I'll do substeps for bullet movement: move in increments of small step and check collisions each substep. That handles tunneling.

I'll implement bullets update with substeps. For each bullet, move in steps of <=4px, checking collisions.

That's more robust. Let me do collisions inside the sub-step loop.

Let me structure: updateBullets(dt): for each bullet, compute distance = speed*dt, steps = ceil(dist/4), stepVec. For each substep, move and check.

But enemy bullets vs player and aliens too. Fine.

Actually to keep it manageable, I'll do substeps for all bullets and check all collisions.

Let me code:

```js
function moveBullets(bullets, dir, dt, onCollide) { ... }
```

Simpler: inline.

Let me define bullet = {x,y,vx,vy,w,h,life,fromPlayer}.

For player bullet, tip at top. For collision we consider rect (x-w/2, y-h, w, h) where y is the tip? Let me define bullet x,y as center, and collision rect as x-2,y-6,4,12.

I'll use center coords.

Substep: newX = x+vx*s, newY=y+vy*s. Then check.

OK let me just write.

Time is limited, let me write the full file.

I'll include sound? No external. Could use WebAudio oscillator, but not required. Skip or add simple beeps with AudioContext (no network). Optional. I'll add tiny beeps maybe. Keep it optional and safe. I'll skip to save time, or add a simple function. Let me add a small audio helper with try/catch. Actually might cause issues; skip.

Let me write.

Now for the HUD, include score, lives, and controls text.

Let me write the file.

After writing, I'll run browser checks.

Let me go.

Let me write the index.html.

Wait, there's a bug: I reassign `resetGame` but `makeBunkers` is referenced in `_resetGame` call. Actually resetGame (the original) references `game.bunkers`? No, original resetGame doesn't set bunkers. I override resetGame after defining it, calling _resetGame then setting bunkers. But `endGame`/key handlers reference `resetGame` variable — since it's a function declaration reassigned, the closure refers to the variable, so it'll use the new one. Good.

But `resetGame()` at the bottom is called after reassignment. Good.

However there's an issue: `setKey` calls `resetGame()` which is now the wrapper. Good.

Let me run the browser to inspect.

The game renders. Aliens look good. Now let me test movement and firing. Use the hook via inspect? The browser tool actions are click/type/key. Let me test with key actions.

Let me test movement by pressing ArrowRight and observing playerX. But how to read the hook value? I can use the `inspect` action maybe returns DOM. Let me use type? Actually I can evaluate via the browser tool? There's no eval action. Hmm.

I could use key action to press keys. To verify programmatically, I could add a visible debug, but better use the inspect to get dom only. Let me check what inspect returns.

Let me try pressing keys and screenshot.

Actually the browser tool might support a way to evaluate JS? Not listed. Actions: reload, inspect, screenshot, motion, click, drag, key, type, scroll. The `type` action types text. `key` presses keys. No eval.

I can test visually via screenshots. Let me press ArrowRight for some time. The key action likely does keydown, maybe with repeat. Let me try.

Alternatively, add a small hidden debug output in the DOM that I can inspect. But I already have the HUD. For testing playerX, I could update HUD? Not necessary.

Let me use key action. First press ArrowRight and screenshot.

Interesting — the key action seems to be a one-shot keypress, not hold. The player moved slightly? Hard to tell. An enemy bullet is visible. The formation moved a bit. So key press is momentary.

The animation frames of aliens changed too. Good.

To test more thoroughly, I can inject a test script by editing the file temporarily? Better: I can use the `type` action to type text into... no.

Hmm, I need to verify behavior programmatically. Maybe the browser tool's inspect can evaluate? Let me check the DOM string. It only gives text.

I could add an auto-test mode triggered by URL hash, but I can't navigate to a hash. Could add a button on the page for tests. Or I can add a small debug panel that runs scripted checks and displays results in DOM, then inspect.

Simplest: temporarily add a self-test script to index.html that runs after load, simulates game via the exposed hook, and writes results to a DOM element. Then inspect. Then remove it. But the hook `press` sets keys. I can drive frames manually.

Actually, better: I can add a query-param based autotest but no navigation. However reload might support URL? The reload action doesn't take URL.

Let me instead write a separate test harness by temporarily modifying index.html to include automated test output. But that's risky if I forget to remove.

Alternative: use the browser to run test via injecting a script through the `type` action? No.

Let me check if `inspect` returns more. Let me try `browser inspect`.

Actually maybe I should just reason and visually test. But the task wants verification. Let me build a temporary self-test into the page guarded by a flag that I can trigger.

Better approach: Create a second file `test.html` that loads index.html in an iframe and runs tests, writing results to its DOM. But index.html exposes window.__invaders; an iframe can access it same-origin. Then browser opens index.html though, not test.html. The browser tool always runs index.html presumably. Hmm.

Could I make index.html detect something? The browser serves the cwd. Maybe I can temporarily replace index.html with test content then restore. That's viable: back up, write test.html as index.html? The browser reload will load whatever is at index.html.

Plan:
1. Copy index.html to game.html.
2. Write index.html as a test harness that includes an iframe src="game.html" (but game.html is a full page; iframe okay) and runs tests on the iframe's contentWindow, then outputs results.

But the iframe must load. Same origin file? The server serves files. Should work.

Actually simpler: test harness can just include the game script? No, it's inline.

Let me do the iframe approach. But careful: index.html final must be the game. I'll restore at the end.

Wait, the game uses fixed timestep via requestAnimationFrame and performance.now. To run deterministic tests, I can drive it by calling requestAnimationFrame naturally while manipulating keys. But tests need to simulate holding a key and waiting frames. That works with real time.

Let me design tests:
- Load game in iframe.
- Check initial state: alienCount 50, lives 3, score 0, bunkerMaterial > 0, playerX ~400.
- Test movement: set press('left', true), wait 300ms, press false; playerX should decrease; within bounds.
- Test firing: press fire, wait; bullet should exist and alienCount eventually decrease? Firing from center—need to align. Could directly test by firing and checking a bullet appears. Better to test hit: move player under an alien and fire until score increases or bunker damage.

Actually to test bunker hit: player bullet travels up from center. Bunkers are at x positions ~ (0/4*800+...)=? Bunkers centered in quarters: gap=200, bunker width 66. bx = gap*i + (200-66)/2 = i*200+67. So bunkers span 67-133, 267-333, 467-533, 667-733. Player starts at 400, which is between bunker 2 (267-333) and 3 (467-533). So bullet from center passes between bunkers and heads to aliens. Aliens start at x0=200, cols 200..600. So bullet at x=400 hits an alien column likely. Good—score should increase.

Test bunker damage: move player to x~100 (under bunker 1) and fire, bunker material decreases.

Let me write the harness with async/await and delays.

The iframe game loop runs on rAF, which runs when iframe is visible. It should.

Let me write the test. I'll control keys via iframe.contentWindow.__invaders.press.

Let me create game.html copy and test index.html.

Actually, an even simpler approach avoiding iframe: I can include the game's script directly? The game script is an IIFE tied to DOM elements with ids. If test page replicates those ids and pastes the script, that works but duplicating. Iframe is cleaner.

But there's a catch: file protocol vs http. The browser serves via http presumably. Let me just try.

Let me back up and create.

Actually, maybe the browser tool serves the whole directory, so iframe src="game.html" resolves. Let's do it.

Let me write the test harness.

Now write test harness as index.html. I'll keep it simple.

Tests:
1. initial values.
2. movement left changes x and clamps.
3. firing creates bullet.
4. hitting alien increases score once (may take time). Move player under an alien column, e.g., x=200 area? Player at col center: alien columns centers at x0 + col*40 + 20 = 200+col*40+20. For col 0 -> 220. So set player near x, but formX changes. Just set player x using? There's no setter. I can move via keys only. Player speed 320 px/s. Start 400; to reach ~220 hold left ~0.6s. But aliens move.

Alternatively, test score by firing straight up from start: start x=400. Aliens span 200-600. At x=400 there will be aliens; enemy moves horizontally though. Bullet takes ~ (start y ~ 546? player bullet spawn y=PLAYER_Y-2=544, alien bottom row y = 70+4*34+5=211, distance ~333 at 620px/s ~0.54s. Alien form moves maybe 26-60px in 0.54s, still within a column width 40? Not guaranteed. Over multiple shots one will hit. Let me just fire repeatedly for 2-3 seconds and check score>0 and that bunker material unchanged (since bullet path between bunkers). Actually formX drift could make... no, bullet path is at x=400 always, bunkers don't occupy 333-467 gap, so no bunker hit. Good.

Then bunker test: move player to x ~100 then fire repeatedly; bunker material decreases.

5. Restart resets: after score>0, call resetGame via iframe? Not exposed. There's press. Restart is triggered by key 'r'. I can dispatch keydown event. Or the harness can call iframe.contentWindow.__invaders.press? restart not exposed. I'll dispatch a KeyboardEvent on iframe window: `new KeyboardEvent('keydown',{key:'r'})`. The listener is on iframe's window. Good.

Let me expose resetGame too for testing? Adding to hook is harmless. But I don't want to re-edit game.html now... I could add. Actually dispatching key is fine and tests the real restart path.

Let me also test invulnerability/lives: hard. Test that enemy bullets eventually hit and lives decrease, maybe. Could take time. With 3 lives, after losing one, invuln. Hard to verify in short time. Let me at least verify lives decrease over ~10s by standing still. Enemy fire interval ~1.15s initially, bullet travel time from y~211 to 546 ~ 335/260 = 1.3s, and player must be under column. Random columns. Might take a while. I'll allow 12s budget maybe. Given 15 min total, okay. But risky/flaky. I'll test with a timeout and report.

Actually I can make it deterministic by reading playerX and moving player under the column that will fire? Can't know. Skip or just observe.

Let me focus tests:
- initial
- left movement + clamp
- fire bullet
- score increments and stays (once per alien)
- bunker damage
- restart resets all

Let me write harness.

Output results into a <pre id="results"> and also console.log so inspect shows.

The inspect action returns dom text. Good.

I'll write the test harness with sequential async steps.

Note: iframe load event. Wait for load then wait a bit.

Let me write.

For delay function.

For checking bullet exists: after pressing fire, wait 100ms, count bullets fromPlayer. Need access to game internals—not exposed. I'll expose a `bullets` count? game.html doesn't. Hmm. I can infer bullet by score eventually. Or add to hook. Since I control game.html, let me add a `bulletCount` to the hook. But game.html is the copy; adding there means final index.html (game) should also have it? It's harmless to include in final too. But I'd have to edit both. Simpler: the test can check a bullet indirectly by score change. But to directly verify "Space to fire upward", better expose. Let me just add bulletCount to hook in the original and re-copy.

Actually I can test firing by moving player to under bunker and firing: bunker material decreases → proves firing works. That covers it. And score test. Good, no hook addition needed.

But let me add bullet count anyway for robust testing; it's fine to keep in final. Let me edit game.html hook to expose bulletCount. Actually let me edit the original index.html (currently test harness pending). I'll first add to game.html, then after tests restore final index from game.html. Since game.html is the copy, I'll make final = game.html content. Let me add bulletCount to game.html.

Let me edit game.html hook.

Also add a setPlayerX for testing? That would help make deterministic. But it changes game. I can add `setPlayerX` to hook. Harmless. Let me add it to game.html only and not final. Since final index isn't game.html necessarily... Actually I plan final index = game.html. Let me just include it in final too, it's harmless.

Add setPlayerX.

Now write test harness as index.html. Wait, game.html has the hook edits but original index.html doesn't. I'll overwrite index.html with the test harness, then at the end copy game.html to index.html so final includes hook (harmless).

Let me write harness.

CSP blocks iframe. I can't use iframe. Alternative: inject the game script directly into the test page? The game script is an IIFE referencing DOM ids. If I include the same markup and copy the script into the test page, tests can access window.__invaders directly. But I'd have to duplicate. Instead, I can build the test page by concatenating the game's script + test script? Since game.html is self-contained, I could create index.html as the game markup plus an appended test <script> before </body>. But the game script defines globals inside IIFE and exposes window.__invaders, so appended script can use it.

Plan: take game.html content and insert my test script right before </body>. That yields index.html = game + tests, and final index = game.html (without tests). But then I verify the tested code equals final minus test script. Good enough.

Let me construct: read game.html, then append test script before </body>.

Let me do it via bash.

I'll write the test script to a file and use python to insert.

Actually simpler: use sed to replace `</body>` with test script + `</body>`.

Let me create testscript.js then build.

But tests reference `fr` iframe — rewrite to use direct window.

Let me write test script content as a separate file tests.js.

The test <pre> didn't appear. Possibly because the test script is an IIFE inserted before </body>, but the game's IIFE is before it, so window.__invaders should exist. But dom only shows HUD. Maybe the pre is there but inspect returns only some? Inspect dom showed the HUD text earlier. The pre appended to body should appear in DOM. It's not. Maybe the script errored early. Console empty though.

Wait — maybe the tests.js contains `</script>` ... no. Let me check: the inserted script uses `window.__invaders` which is set at end of game IIFE. Should be fine.

Maybe inspect's dom only returns visible/text? It showed HUD. The pre would also. Hmm.

Perhaps the replace found the FIRST `</body>` ... there's only one. Let me verify index.html contains the test script.

Also maybe the game script runs and then test script errors because `KeyboardEvent` etc fine.

Let me check console via inspect after waiting. Actually reload returned immediately with no console errors. Maybe tests take ~8s and reload snapshot was taken at frame 1. The "running..." from before was from prior index. Now it shows HUD, meaning test pre maybe not added yet? No, pre is appended synchronously when script runs.

Unless CSP for inline script? The harness itself has inline scripts too and worked (the iframe version showed "running..."). Hmm, CSP blocked framing but inline script ran. 

Wait, in the iframe version, "running..." appeared because that <pre> was in static HTML. The test script there may not have run due to iframe. Actually it did set out text. Fine.

Let me inspect the built index.html tail to confirm.

grep -c results = 1, meaning the test script got inserted but only one "results"? My tests.js has out.id='results' once. OK. Let me look at tail more. Also the appended script starts with `<script>`. Let me check.

The test script is there. The pre should appear. But inspect DOM didn't show it. Maybe inspect only captures a specific element tree? It showed HUD text. The pre is appended to body. Odd.

Maybe the browser's reload response is from frame 1 and the script is still running? No, synchronous append happens immediately.

Wait — maybe the game's `overlay` etc. and my pre is added, but `out.textContent` updates. inspect returns dom string maybe filtered to visible text? The pre is position fixed with z-index. Should show.

Let me just wait and inspect again.

Tests running. We can see bunker damage (left bunker has huge hole), player bullet, score 11, lives 2 (enemy shot hit during test). The test is ongoing. Let me wait and inspect again for final results.

Note: the test output is being overwritten by game updates? The `out.textContent` updates. Let me wait ~8s.

All tests passed:
- initial: 50 aliens, 3 lives, score 0, bunkerMat 292
- movement right increases, left clamps at 20
- firing creates bullet
- bunker damage decreases
- score delta equals aliens destroyed (18 each)
- enemy bullets present
- restart restores all

Interesting: after restart, bunkers show damage in the screenshot (3rd and 4th bunkers have holes) but bunkerMat=292 matches initial. Wait, initial bunkerMat=292? Earlier initial said 292. But makeBunkers per bunker: cols 11 x rows 7 = 77 cells each, 4 bunkers = 308. Arches carved: rows 5,6 (indices 5,6), cols 4-6, with (r==5 && (c==4||c==6)) excluded. Let me count removed: r=5: c=5 only (since c4,c6 excluded) -> 1. r=6: c=4,5,6 -> 3. total 4 per bunker, 16 total. 308-16=292. Correct. The screenshot shows damage on 3rd and 4th bunkers after restart? Wait restart happened, so should be pristine. Actually the screenshot was taken at frame after restart but there are enemy bullets still in flight and maybe damage happened in the 200ms after restart? Restart clears bullets? resetGame sets bullets: []. But aliens fire within 200ms? alienFireTimer 0.9, no. The holes in 3rd/4th bunkers—look carefully. Actually those holes might be... hmm. Third bunker has a chunk missing top-right, fourth has top-left missing. That contradicts bunkerMat=292 (pristine). But the DOM says 292.

Wait, maybe the 200ms delay allowed enemy bullets from before restart? No, bullets cleared. Actually reset() dispatches keydown 'r'. The game's setKey on keydown for 'r' calls resetGame. Then 200ms pass. Since restart, bunkers pristine. But screenshot shows damaged 3rd/4th bunkers. 

Hmm, but the displayed pre text is from test, and the canvas shows post-restart state. Maybe the screenshot is a stale frame? Or my read of the image is wrong—the "holes" could be the arch? No, arches are bottom-center. The 3rd/4th appear to have notches at top. Let me look again: 3rd bunker top edge has a step; 4th has a notch top-left. That's damage.

Wait, could it be that reset() didn't actually reset because `game.state` after restart is "playing" and the pre says restored=true with bunkerMat=292. The hook reads live game.bunkers. So at check time it was 292. The screenshot may be from an earlier moment captured before restart? The image is attached at inspect time. Actually the image shows SCORE 0 LIVES 3, which is post-restart. So bunkers in render... but 292 pristine. That's contradictory unless my makeBunkers has random? No.

Hold on: maybe the 200ms after reset, an alien bullet already in flight? No. Or the player bullets from before restart persisted? resetGame sets bullets=[]. 

Actually, wait. Look again at the image: The third bunker shows shape with a step on the top right; the fourth shows a notch top-left. Hmm, could these be from the render happening before the bunker reset but after score reset? Since resetGame is synchronous, no.

Alternatively, the image may have been rendered at a frame before restart but the score/lives text updated? No.

Let me not overthink; the DOM hook confirms restored=true and bunkerMat=292. But the visual is concerning. Let me test restart visual directly: reload the game fresh (without tests) and screenshot; then damage and restart.

Actually, I bet the issue: my override `resetGame = function(){ _resetGame(); game.bunkers = makeBunkers(); }`. But `_resetGame` is the original function. Fine. However, note that `resetGame` is declared with `function resetGame()` and then reassigned via `var _resetGame = resetGame; resetGame = function(){...}`. But inside the original resetGame, it doesn't touch bunkers. Good.

Hmm, but there's a subtlety: `makeBunkers()` uses `BUNKER_Y` etc. fine.

Wait — maybe the screenshot's "damage" on bunkers is actually the arch plus the way the image renders. Let me re-examine: first bunker shows a small bottom-center arch. Second shows a larger arch. Third shows top-right chunk missing and no bottom arch? Fourth shows top-left chunk missing. That strongly suggests damage. But bunkerMat 292 means all pristine.

Could the inspect image be from a cached earlier frame (like the tool attaches the last screenshot from a previous action)? The action inspect might return the most recent frame. Possibly it's a frame from before restart, but the DOM updated after. The image rendering may lag.

Let me do a clean verification: build final index.html = game.html, reload, and do a manual sequence with screenshots.

But also I should verify the gameover and win states, and the "shoot through gap" behavior. Given time, let me at least verify the final game loads and restart visual.

Let me build final index.html from game.html and test manually.

Actually, first let me reconsider a potential real bug: In `render()`, bunkers are drawn from `game.bunkers`, which is set. Fine.

The override reassigns `resetGame` but the very first call at the bottom `resetGame();` is after override, so bunkers created. Good.

I think screenshot lag is the explanation. Let me build final and verify.

Also I should double check the enemy shot reaching player zone and game over, and win. Hard to test quickly. I'll trust logic but maybe do a quick targeted test by adding a temporary test that forces state. Could call with x. Actually exposing more hooks to force gameover/win is possible but not necessary. The task says report unverified behaviors.

Let me finalize: copy game.html to index.html. Then reload and screenshot to confirm first frame.

One more consideration: the final `index.html` includes the testing hooks `setPlayerX`, `press`, etc. These are harmless but expose internals. Fine.

Wait, game.html is the copy I edited (added hooks). It also has the earlier added playerBulletCount/enemyBulletCount. Good.

But does game.html still contain the original everything? Yes. Let me copy.

Also remove tests.js and game.html? The task only requires index.html. Leaving extra files is fine, but cleaner to remove game.html and tests.js. Actually the harness only runs index.html. Let me remove extras after copying.

Let me copy and reload.

Final game loads with pristine bunkers (all 4 identical with small bottom arch). Great — confirming the earlier "damage" was just screenshot lag or the fact that the restart test screenshot was mid-render.

Now let me do a quick manual test of resting state, and check gameover/win maybe not. I have time. Let me verify the overlay/restart UI by triggering game over artificially? I can use the hook via... no eval. I could temporarily add a keyboard shortcut? Not needed.

Let me check a few things via a quick temporary test injection like before to verify game over and win transitions. But time budget is fine. Let me do a focused test by rebuilding a temporary test page that forces gameover by setting lives and letting enemy hit. Too flaky.

Alternative: verify endGame logic by forcing all aliens dead: I can repeatedly fire. That's slow but with setPlayerX tracking each alien... Actually I can expose a function? Not in final. I could create a temporary test file again with appended script that manipulates internal game via a new hook. Since the hook doesn't expose mutation of aliens/lives, I can't.

But I can test win by killing all aliens with an automated aim: iterate over columns and move player to each column x and fire many times. Aliens drift but eventually killed. That's doable within ~30s. Then check state === 'win'. Similarly game over by standing still long enough (enemy bullets) - flaky but enemy fire is frequent.

Given the tests already validated core mechanics and the task says a brief pass, I think it's good. But verifying win/gameover states would be valuable. Let me do a quick appended-test run for win and game-over using the exposed press/setPlayerX, which the hook already has. I still need to build a test index. Let me do it quickly.

Test plan appended:
- Wait load.
- For each of ~10 columns, setPlayerX(200 + col*40 + 20), fire repeatedly until column aliens gone or timeout. But aliens move horizontally and descend; aimming at a fixed x may miss as they drift. Better: repeatedly read alien pixel? Not exposed. Hmm.

Could expose a function to kill all aliens? That's cheating the test. Better to just fire continuously while sweeping across the field. With 50 aliens and the score equal test already showing 18 kills in 6s of firing at x=400, sweeping could clear remaining in ~20s.

Let me build a temp test that sweeps: while state==='playing' and time<40s, move player across range and fire. Then check state is 'win'. Then restart, then for game over, just wait with no movement until state gameover (max 30s). Enemy bullets are frequent (25 samples over 2s), so likely hits within ~15s. Actually lives=3 with invuln 2s each, so need 3 hits after invuln windows. Could take a while. Let me allocate.

Given the 15-minute budget and I've used maybe 6-7 min, let me do a concise test for win only plus maybe gameover.

Actually, the requirement to verify is about movement/firing/bunker/score/restart, which I've done. Win/gameover are edge states. I'll do a quick win test.

Let me create the test build again from final index + appended script. But final index no longer has game.html. I'll make a backup.

Let me do it.

Wait for the test to run. It may take up to 45+40s. Let me wait ~30s and inspect. Meanwhile I can't do much. Let me sleep 30.

The sweep test got to gameover with 3 aliens left at score 47 — but game over occurred because aliens descended to player zone (the sweep took too long / or player got hit). It shows 0 lives and score 0 after restart? Wait: "after sweep state=gameover aliens=3 score=47", then restart. The screenshot shows SCORE 0 LIVES ◆◆◆ and pristine-ish aliens (10 columns) but 2nd and 3rd bunkers damaged — because restart happened and then the idle phase began, during which enemy fire damaged bunkers? Bunkers don't get damaged by enemy fire unless bullets hit them, which they do. And it's now in playing state idling.

Wait, restart shows aliens=50 lives=3 score=0 good. But bunkers after restart show damage on 2nd/3rd — that's from enemy bullets during idle. That's expected gameplay, not a reset failure. Good.

The gameover happened before clearing all aliens, so win state not verified. Given time, I'll accept. The gameover state is verified. Win logic is straightforward (endGame('win') when alive.length===0) but unverified at runtime.

Actually wait: the sweep ended in gameover with 3 aliens remaining, meaning aliens reached the player zone (not zero lives?). The log shows restart lives=3. The overlay would say. It's possible aliens descended. Either way gameover triggered.

Now the idle phase will continue; eventually reaches gameover again. Let me not wait.

Let me restore final index from backup and remove temp files.

Actually, win detection: when all aliens dead. In test, at score 47 only 3 left, close. If I had a bit more time it might've won. But gameover cut it. It's fine.

Let me restore and do final reload check.

Final file confirmed clean, no console errors, no external URLs. Done.

Let me write the report.