Mario-style platformer · qwen3.8-max-0902

Let me check the directory and the Phaser version.

Phaser 3. Build the game. Single scene, graphics-generated textures (player, enemies, coins, tiles, flag, background). Camera bounds set via setBounds, follow player, and deadzone if needed. Restart resets the scene (scene.restart).

Alright, let's write index.html.

Design: level width ~4000px. Ground segments with gaps, platforms, coins, patrolling enemies (reverse direction at edges/walls), goal flag at the end. Win/lose overlay with Restart button (R key or click).

Physics: arcade. Player texture: Mario-style (red hat, blue overalls) drawn with graphics, generateTexture.

Enemy patrol: give each enemy a velocity, flip on hitting edge/wall — easier: set velocityX and patrol by checking a distance range from origin, or use blocked checks. Going with range-based patrol: store originX, range ~100, flip velocity at boundaries.

Stomp: if player.body.blocked.down or velocity.y > 0 and player's bottom edge is near the top of the enemy → defeat enemy (flatten + disable after tween), player.setVelocityY(-350). Otherwise → lose.

Falling into gap: y > levelHeight → lose.

Coins: overlap → collect, disable, count++.

Flag: overlap → win.

Lose/win: overlay rectangle with text and Restart button; also R key and restart via scene.restart().

Display controls on screen.

Let's write it.

there's an unnecessary line inside update: `const jumpKey = ... addKey(32) ...` — since a key is generated on every frame, remove this. Also, `reachFlag` uses `this` — in the overlap callback where context is the scene, the this inside reachFlag will be the scene. This is fine (I passed `null, this` as the context). However, reachFlag(playerObj, flagObj) — `this` will be the scene context. OK.

Remove the jumpKey line. Also, win() slides the player down to the ground via a tween, but the player's physics body might conflict — body.moves=false is already set, so no problem.

Also, regarding the jump in update: jumpPressed is only consumed when onGround; it should be cleared when leaving the ground without jumping, otherwise it would hold the buffer. It's fine — a small buffer.

I'll fix it and then test in the browser.

Also, holding down the up arrow / W key causes jumpPressed to be repeatedly set to true, but jumpPressed gets set to false when jumping, and since you're in mid-air, you won't be onGround anymore. When you land while still holding it down, it'll jump again—this is acceptable (like repeated jumps). Actually, "preventing consecutive mid-air jumps" is the requirement—it's satisfied since onGround is required.

Next, testing in the browser.

Game rendering looks good. Issues I noticed:
1. The second row of the ground (the dirt below) is tinted 0x8a6a4a, but it looks like a green stripe is showing up — the ground texture has grass on top, so the second row also displays a green top stripe. Looks a bit weird but acceptable — actually, in the screenshot the second row shows green stripes. Let's make the dirt row a separate texture without grass.
2. The hills are drawn behind the ground — no problem.
3. The player is standing at x=80.

Next, test the controls: move right, jump, camera follow, coin collection, stomping enemies, restart.

First, fix the dirt texture.

Wait — the dirt row is static physics tiles at GROUND_Y+40. But the player only collides with the top surface of the ground. No problem.

But the gap: the dirt row is only under the segments — good.

Reload and test: press D to move right, check the camera. Use browser key operations. Browser tool: key action with text? Let me check the actions: key (probably sends a key). Try: hold right with key? The tool's "key" probably presses a key once. For hold, might need keydown/keyup. Let me test: use key action with text "ArrowRight"? Unclear. Try click/key and inspect player position via console? Can't easily access the scene... maybe I can expose the game globally for debugging: window.game = new Phaser.Game. Add that. Then I can evaluate via inspect? The browser tool has "inspect" which returns DOM/console. Can I run JS? Probably not. But can I read state via console logs? Not interactive.

Simplest: expose window.__game and check via console logs? Not interactive.

Alternative: test with keyboard events: browser "key" action with text like "d"? Let me try: key action with text "ArrowRight", then screenshot. But for hold... the tool might support keydown/keyup via text? Unclear.

Let me try: browser key with text "Space" — see if the player jumps (screenshot). For movement, maybe send keydown and keyup separately? The tool spec only has "key" with text. Probably presses and releases.

Better approach: verify via simulation — can't run Phaser headlessly? Maybe I can run node with phaser? Phaser needs DOM. Hmm.

Maybe I can add a debug hook: window.__dbg = () => ({x: player.x, y: player.y, cam: ...}). But I can't call it from the browser tool.

Let me check what the browser tool's "key" does — probably dispatches keydown+keyup. For hold, maybe I can dispatch keydown via "type"? "type" types text into an input field.

Alternative practical test: use motion/screenshot frames after sending key events. If key = press-and-release, then one tap of right = short movement. Multiple taps should accumulate movement. Jump: tap Space → player jumps; verify with motion frames.

Actually, maybe the tool's "key" supports holding? Let me try anyway.

First, expose game state for debugging: add window.__game = game in the script. Then maybe I can read it via inspect's console? inspect returns the console log. I can log state periodically? That would pollute.

Better: use browser "inspect" — maybe it can evaluate? Description: "Run index.html, inspect DOM/console, interact, view screenshots or motion frames." Interaction = click/drag/key/type/scroll. No evaluate.

OK, I'll do visual testing via screenshots/motion.

Plan:
1. Reload, screenshot (initial position ~x=80).
2. Send key "d" several times? Single press gives small movement. Hmm, but maybe the tool holds the key during motion capture? Unclear.

Alternative: implement a small autoplay test hook: add a query parameter ?test=1 that programmatically simulates input (holding right, jumping at specific times), and logs results to console. Then inspect the console. This is a clean way to verify physics: run a scripted demo: hold right for 2 seconds, jump, check coin count increase, camera scroll, etc. And log assertions to console.

Even simpler: expose window.__state that updates every frame, and log to console at fixed intervals during the test run.

Let me add: const params = new URLSearchParams(location.search); if params has 'autotest', run scripted input: set keys via scene.input? Can simulate by directly setting player velocity? No — better to simulate real key events: dispatch KeyboardEvents to document? Phaser listens to window keyboard events. I can dispatch synthetic KeyboardEvents: window.dispatchEvent(new KeyboardEvent('keydown', {code:'ArrowRight'})). Phaser's keyboard plugin listens on window's keydown. My Space handler listens on document's keydown — synthetic events also work.

So autotest script: at t=500ms dispatch keydown ArrowRight; at t=1500 keydown Space (my document handler sets jumpPressed), at t=1600 keyup Space; at t=2500 keyup ArrowRight; log state (player.x, y, camera.scrollX, coinCount) at each interval; also test restart: dispatch keydown 'KeyR'.

Then check console via inspect.

Let me add this autotest block. Keep it small.

Also, verify that enemies patrol and stomping works — hard to script precisely; maybe I can teleport the player above an enemy and drop them: in autotest, set player position above enemy 600 and let them fall, log enemy alive state and player's velocity bounce.

Win test: teleport player near the flag and check gameWon → message. Lose test: teleport into a gap.

Write autotest to run sequentially with time.delayedCall, log results with console.log('TEST', ...).

Implementation: inside create(), if (location.search.includes('autotest')) { runTests(this); }

runTests(scene):
- t0: log initial player.x, camera scrollX.
- +300: dispatch keydown ArrowRight (hold).
- +1300: dispatch keydown Space; +1400 keyup Space. (jump while running)
- +1800: log position (should have moved right and be airborne or landed), camera scrollX > 0.
- +2200: keyup ArrowRight.
- +2500: teleport: player.setPosition(600, 300) above enemy 600; let them fall.
- +3200: log enemy alive count and player velocity.y (should be negative bounce) — check enemies children alive.
- +3800: teleport player to coin area? Coin at (620,400): place player at (620, 380) → overlap collects coin; log coinCount.
- +4300: teleport player to gap (800, 300) → fall; +5000 log gameOver true.
- +6000: dispatch KeyR restart; +6500 log player.x==80, coinCount==0, camera scrollX==0.
- +7000: teleport player to flag (LEVEL_W-220+10, GROUND_Y-100); +7800 log gameWon.

Log everything with console.log('[TEST] ...').

Then browser reload with URL? The browser tool runs index.html — can I control the query string? Probably loads index.html as-is. Hmm. Maybe I can trigger autotest via a key? Or expose window.__autotest() that can be called... but I can't call it.

Alternative: run autotest always but only after a special key? Can't send either.

Hmm, maybe the browser tool's "key" can send keys. If so, I can do manual testing: hold? Probably single press.

Let me check the browser tool more: actions are reload, inspect, screenshot, motion, click, drag, key, type, scroll. "motion" probably captures frames over time. "key" sends a key press (maybe with hold duration?).

Given the uncertainty, the simplest and most robust approach: gate autotest on a localStorage flag? The tool can't set it.

Gate on URL hash? The tool probably loads a fixed path.

OK, alternative: run autotest unconditionally but only if window.name contains 'test'? Can't set.

Hmm — maybe I can test manually with key events: if "key" dispatches keydown and keyup immediately, then a single tap of right moves the player slightly (velocity 230 for ~ms). Not enough.

But maybe the tool's key holds the key until another key? Unclear.

Let me try: send key "ArrowRight", then screenshot; send again, screenshot; compare player x. If each tap moves ~5-10px, visible after several taps.

Actually, let me look at how the browser tool is implemented — it's a custom tool; maybe there's documentation? Not available. Try anyway.

Or use "type" with text "ddddd"? Type types characters — each character is keydown+keyup.

Hmm, but for jump I need to press Space during running... tap-based movement is choppy but physics still works: tap right 10 times then tap Space: onGround true → jump. Motion frames show the jump arc. That verifies jump+gravity. Camera follow: move right enough (many taps) to push camera past deadzone... deadzone 120 wide centered? setDeadzone(120,200) — camera follows with deadzone; player needs to move ~ (960-120)/2 = 420px from center? Actually deadzone is centered; player starts at x=80, camera clamped at 0. Player must exceed camera.scrollX + (960+120)/2 = 540 to push camera right. That's ~460px of movement. Many taps.

Better: reduce dependence on manual: implement autotest triggered by keyboard shortcut? E.g., press 'T' to run scripted test? I can send key 'T' via the tool! Then autotest dispatches synthetic events internally (no tool hold needed).

So: in create(), bind key 'T' → runTests(scene). Then via browser: key 't', wait, inspect console for [TEST] logs.

Also keep manual playability.

Synthetic KeyboardEvent to window: Phaser's KeyboardPlugin listens on window (default target is window). My Space handler is on document — a synthetic event dispatched to window will bubble to document? Events dispatched to window: capture goes window→document→..., target window, bubble goes document→window. A document listener with default (bubble) receives events targeted at window during bubbling? For events targeted at window, the propagation path is window only? Actually, dispatching to window: path is window → document → ... hmm, when target is window, the event path includes window and document? Per spec, when target is window, the event path is window, document, ...? In browsers, dispatching to window triggers document listeners during bubbling (path: window → document → html → body? no...). Let me recall: window.dispatchEvent — listeners on document do fire (bubble phase includes document? Actually the propagation path for target=window is just [window]? Hmm, in practice document.addEventListener('keydown') catches events dispatched to window? I think yes: the event path for target window is window → document → ... no wait, bubbling goes from target upward: target window is the top; so document listeners don't fire.

Safer: dispatch synthetic events to both window and document, or make my Space handler listen on window too. Change document listener to window? Real key events target document/body and bubble to window — window listener catches them. Synthetic events dispatched to window also caught. Use window for both handlers.

Phaser's keyboard: listens on window by default (config inputKeyboard target is window). Good.

Also 'KeyR' restart is via Phaser key — synthetic KeyboardEvent with code 'KeyR' works with Phaser (it uses event.code). Good.

runTests implementation:

function runTests(scene){
  const log = (...a)=>console.log('[TEST]', ...a);
  const kd = code => window.dispatchEvent(new KeyboardEvent('keydown',{code}));
  const ku = code => window.dispatchEvent(new KeyboardEvent('keyup',{code}));
  const at = (ms, fn) => scene.time.delayedCall(ms, fn);
  const st = () => ({px: Math.round(player.x), py: Math.round(player.y), vy: Math.round(player.body.velocity.y), cam: Math.round(scene.cameras.main.scrollX), coins: coinCount, over: gameOver, won: gameWon});
  log('init', JSON.stringify(st()));
  at(200, ()=>{ kd('ArrowRight'); });
  at(1200, ()=>{ kd('Space'); });
  at(1300, ()=>{ ku('Space'); log('jumping', JSON.stringify(st())); });
  at(1700, ()=>{ log('airborne/landed', JSON.stringify(st())); });
  at(2000, ()=>{ ku('ArrowRight'); log('after run', JSON.stringify(st())); });
  // stomp test
  at(2300, ()=>{ player.setPosition(600, 320); player.setVelocity(0,0); log('teleport above enemy', JSON.stringify(st())); });
  at(3000, ()=>{ const alive = enemies.getChildren().filter(e=>e.getData('alive')).length; log('stomp result aliveEnemies='+alive, JSON.stringify(st())); });
  // coin test
  at(3400, ()=>{ player.setPosition(620, 400); player.setVelocity(0,0); });
  at(3800, ()=>{ log('coin collect', JSON.stringify(st())); });
  // gap lose test
  at(4200, ()=>{ player.setPosition(800, 300); player.setVelocity(0,0); });
  at(5600, ()=>{ log('gap lose', JSON.stringify(st())); });
  // restart
  at(6200, ()=>{ kd('KeyR'); ku('KeyR'); });
  at(6800, ()=>{ log('after restart', JSON.stringify(st())); });
  // win test
  at(7200, ()=>{ player.setPosition(LEVEL_W-200, GROUND_Y-60); player.setVelocity(0,0); });
  at(8200, ()=>{ log('win', JSON.stringify(st())); });
}

Note: after lose at 5600, message shown at +900 => 6500; restart at 6200 before message? lose() sets gameOver at 4200+fall time (~0.6s) => ~4800; message at 5700. Restart at 6200 destroys msgLayer and restarts scene. Good.

After restart, create() runs again; test binding 'T' remains but tests don't re-run (only manual). Good.

Win test: flag overlap requires physics overlap; teleport player onto flag body area: flag body is (LEVEL_W-220, GROUND_Y-210) size 60x210 → x range 4180-4240. Player at 4200, y 400. Good.

Note: win() tweens player and stops camera follow. Then log won=true.

Also during test, 'Space' keydown via my window handler sets jumpPressed; update consumes when onGround. At 1200ms player is running on ground → jump. Good.

Edge: kd('ArrowRight') — Phaser's cursor keys use code 'ArrowRight'. Good.

Add binding: this.input.keyboard.addKey('T').on('down', ()=>runTests(this)); but avoid double-run: guard with testsRan flag.

Also change document listener to window.

One more fix: in update, `if (cursors.up.isDown || keysW.isDown) jumpPressed = true;` — holding W auto-jumps on landing; acceptable.

Also remove unused spaceDown usage? spaceDown is still used in window handler for edge trigger. jumpPressed set on keydown edge. Fine.

Potential issue: hitEnemy 'above' check: player.body.bottom - enemy.body.top < 18. Player falling onto enemy: at moment of overlap, bottom slightly above enemy top... overlap occurs when bodies intersect; bottom - top is small positive. OK.

Enemy body size set to 30x20 with center origin: body offset default from texture size 34x20... setSize(30,20) keeps offset? setSize changes size; offset remains (0,0)? Default offset is computed? After create, setSize: offset unchanged (0,0), so body is 30x20 at sprite top-left; texture 34x20 → nearly centered horizontally (2px). Fine.

goombaFlat texture is 34x12; after setTexture, body remains 30x20 but body disabled anyway.

Flag: physics.add.existing on container — container body support? Arcade body on container works (GameObject has body). Overlap with container body should work.

Camera deadzone: setDeadzone(120,200) with follow lerp — OK.

Also player start y: GROUND_Y-60=400; body height 28 → lands on 460. Good.

Coin circle body radius 10 offset (2,2): coin texture 24x24, circle center at (12,12). setCircle(10,2,2) sets offset so circle is at (2,2)-(22,22): center (12,12). Good.

Now, implement edits.

Problem: runTests is defined after the config / new Phaser.Game, but create references it via closure — function declarations are hoisted within the IIFE, so no problem. However, the `testsRan` variable is declared after create's usage site — but since it's only *called* at runtime after everything has been defined, no problem (let hoisting: TDZ applies until execution reaches the declaration; create runs after Phaser.Game is constructed, which happens after the let statement has executed? new Phaser.Game(config) is called at the very bottom, after the let declaration. Yes, no problem).

Reload and send the key 't'.

The dirt now looks correct. Next, I'll press "t" to run the self-test.

The test has started (initial log). Wait about 9 seconds, then check the console to review all the test logs. Use inspect after a delay. The inspect action returns the console immediately. Need to wait. Use bash's sleep? The browser tool is separate. Can I run bash's sleep 9 in parallel? The calls would run concurrently... I need sequential execution: first sleep, then inspect.

Wait, but the test included a scene restart at the