Dangerous Dave platformer · kimi-k3

Let me build a single-file platformer. Design a tile-based level with ASCII map. Tiles: solid, fire, water, trophy, exit, enemy spawn, player spawn.

Let me design a level ~ 40x20 tiles, tile size 24px maybe. Canvas 960x480.

Level plan (legend):
- `#` solid
- `F` fire (hazard, drawn animated)
- `W` water
- `T` trophy
- `E` exit door
- `P` player start
- `o` enemy spawn (patrols horizontally until wall/edge)

Design a completable route. Let me make rows 20 rows of 40 cols. Simpler: 30 cols x 16 rows, tile 32px → 960x512.

Let me lay out a map:

Row indices 0..15, cols 0..29.

```
##############################
#............................#
#............................#
#..........T.................#
#.........#####..............#
#............................#
#.....o............E.........#
#....#####......#####........#
#............................#
#............o...............#
#..........######............#
#............................#
#..P.........................#
#.#####.....FFFF......WWW....#
#............................#
##############################
```

Hmm, need hazards on ground level so player must jump over them. Trophy reachable via platforms. Exit on upper platform, requires climbing via left platform chain.

Let me refine: ground at row 14 has fire and water pits? Actually make ground full solid at row 15 bottom, and row 14 with hazards sitting on ground. Fire on ground blocks path; jump over.

Make the map:

```
##############################
#............................#
#.............T..............#
#............#####...........#
#............................#
#...o........................#
#..######....................#
#....................E.......#
#..................#####.....#
#............................#
#.........o..................#
#........#####...............#
#............................#
#.P..........................#
#.###.....FF......WW.........#
##############################
```

16 rows. Check reachability: player start at row 13 col 2, platform row 14 col1-3 (`.###` under P at col2). Ground row 15 is solid everywhere (bottom row all #). Actually then hazards at row 14 sit on ground row 15 — player can jump over FF (2 tiles wide, jump height ~3 tiles at 32px... need jump velocity to clear ~2 tiles). Fine.

Climbing: platform row 11 cols 8-12, row 7 cols 2-7, row 8 exit platform cols 18-22, row 3 trophy platform cols 12-16.

Player jump height: need to reach row 11 from ground (row 14 standing, feet at row14, need to land on row11 top). Jump height 3-4 tiles. v = -12 px/frame at 60fps, gravity 0.6 → h = v²/(2g) = 144/1.2 = 120px = 3.75 tiles. OK, can climb: from ground row 14 top... platforms: row 11 (3 tiles up) reachable. From row 11 platform to row 8 exit platform: 3 up — but exit platform at cols 18-22, row 11 platform at cols 8-12; horizontal gap cols 13-17 = 5 tiles gap at same jump... too far. Add another platform.

Let me restructure more carefully. I'll define the map with clear stair platforms:

```
row0:  ##############################
row1:  #............................#
row2:  #............T...............#
row3:  #...........#####............#
row4:  #............................#
row5:  #..o.........................#
row6:  #.#####......................#
row7:  #....................E.......#
row8:  #..................#####.....#
row9:  #............................#
row10: #............o...............#
row11: #..........#####.............#
row12: #............................#
row13: #.P..........................#
row14: #.###.....FF......WW....####.#
row15: ##############################
```

Route: start row13 col2 on platform row14 cols1-3. Move right along ground (row15 top = row14 walk). Fire at row14 cols 12-13? `.###.....FF......WW....####.` — count: col0 '#', col1 '.', cols2-4 '###'? Let me count: string "#.###.....FF......WW....####.#" chars: 0:'#',1:'.',2:'#',3:'#',4:'#',5:'.',6:'.',7:'.',8:'.',9:'.',10:'.',11:'.',12:'F',13:'F',14:'.',15:'.',16:'.',17:'.',18:'.',19:'.',20:'W',21:'W',22:'.',23:'.',24:'.',25:'.',26:'#',27:'#',28:'#',29:'#'. Wait that's only 30 chars, and col29 is '#' good, but col0 '#' and then bottom row all solid. Fire at 12-13 sits on ground row15 — it's just a hazard on the floor; player walks at row14 (standing on row15)? No — row14 is mostly '.', so the player stands on row15 tiles, occupying row14. Fire tiles at row14 cols12-13 will kill on contact; jump over 2-wide fire. Water at 20-21 same. Then solid block cols26-28 at row14 (wall) — jump onto it (1 high) fine.

Climbing: from ground jump to row11 platform (cols10-14): from row14 standing, top of row11 is 3 tiles up — reachable (3.75 max). From row11 platform jump to row8 exit platform (cols18-22): row8 top is 3 up from row11 top, horizontal gap cols15-17 = 3 tiles. Jump: horizontal speed ~3px/f, airtime ~40 frames = 120px ~ 3.75 tiles. Doable but tight-ish; fine, and gap of 3 tiles is ok.

From row8 exit platform, jump left to row6 platform (cols1-5)? That's far. Trophy on row3 platform (cols11-15). From row8 platform jump up to... need route to trophy. From row8 (cols18-22) jump up-left? Nothing there. Add platform chain. Let me add:

row5-6: platform cols1-5 with enemy (row5 col2 enemy, row6 platform). Also add platform at row5 cols 24-27? Trophy platform row3 cols11-15 (4 up from row7? no...).

Simplify: make vertical stair on right side. Add row5 platform: `#.....................#####.#` cols 23-27? Then from row8 platform (18-22) jump to row5 platform (23-27): 3 up, 1 gap — fine. Then from row5 platform jump up-left to trophy platform row3 (cols11-15)? That's 2 up but horizontal gap cols16-22 = 7 tiles — too far. 

Alternative: make trophy reachable from the enemy platform chain on the left. Route: ground → row11 (10-14) → row8 exit (18-22) → need trophy... 

Simpler: put trophy platform with its own staircase on the left: enemy platform row6 cols1-5; from there jump up to trophy platform row3 cols11-15? Gap cols 6-10 = 5 tiles horizontal, 3 up — too far.

Easiest: rearrange so trophy sits on a platform chain. Let me redesign cleanly:

```
row0:  ##############################
row1:  #............................#
row2:  #..T.........................#
row3:  #.####.......................#
row4:  #............................#
row5:  #......o.....................#
row6:  #....######..................#
row7:  #............................#
row8:  #.............E..............#
row9:  #............#####...........#
row10: #............................#
row11: #..............o.............#
row12: #............######..........#
row13: #.P..........................#
row14: #.###.....FF......WW.........#
row15: ##############################
```

Route: start (row13) on platform row14 cols1-3. Jump to row12 platform (cols12-17)? Horizontal distance from cols1-3 to col12: 9 tiles — too far from standing start on small platform. Hmm.

OK let me just design a clean zigzag with ≤3-up, ≤3-gap jumps:

- Start platform: row14 cols1-3 (on top row13).
- Platform A: row12 cols6-10 (enemy on it? patrol). From start: 2 up, gap cols4-5 (2). Good.
- Platform B: row9 cols12-16. From A: 3 up, gap col11 (1). Good.
- Platform C: row6 cols6-10. From B: 3 up, gap cols11... wait B is 12-16, C is 6-10: gap col11 (1 tile), 3 up. Good (jump up-left).
- Trophy platform D: row3 cols1-5, trophy row2 col2. From C: 3 up, gap cols... C 6-10, D 1-5: adjacent, gap 0? Jump up-left from left edge of C onto right edge of D. Fine.
- Exit platform E: row9 cols18-22, exit row8 col19. From B (12-16): same height-ish? E at row9, B at row9, gap col17 (1 tile) — just walk/jump across. Good.

So map:

```
row0:  ##############################
row1:  #............................#
row2:  #.T..........................#
row3:  #.####.......................#
row4:  #............................#
row5:  #............................#
row6:  #.....######.................#
row7:  #............................#
row8:  #..................E.........#
row9:  #...........#####.#####......#
row10: #............................#
row11: #............................#
row12: #.....#####..................#
row13: #.P..........................#
row14: #.###....FF......WW.....o....#
row15: ##############################
```

Hmm wait row9 has B at 12-16 and E at 18-22 with gap col17: "#...........#####.#####......#": count: col0#, cols1-11 dots(11), cols12-16 #####(5), col17 '.', cols18-22 #####(5), cols23-28 dots(6), col29#. Total 30. Good.

Exit at row8 col19 → "#..................E.........#": cols1-18 dots? col0#, dots 1-18 (18 dots), E at 19, dots 20-28 (9), #29. 

row12 platform cols6-10: "#.....#####..................#": #, dots1-5, #6-10, dots11-28, #29. 

Enemy: put on row12 platform (spawn row11 col7) or on ground row14 right side patrolling between water and wall. Ground enemy patrol: it patrols horizontally and turns at walls/edges. Put enemy 'o' at row13 col24 on ground; it'll walk left until fire? Enemies: turn around at ledge edges or walls. On ground (row15 solid everywhere) it would walk into fire/water and... let enemies reverse when hitting a hazard tile too, or just let them patrol full width and be lethal — player must time jumps over fire while avoiding enemy. Keep simple: enemy reverses at walls, hazards, and ledges. Ground enemy at col24 patrols cols 22-28 region (between water at 20-21 and wall... row14 cols26-28 wall? I removed the wall). Let me add a wall on right end: row14: "#.###....FF......WW......###.#"? Count: #, .1, #2-4, dots5-10, F11-12? Hmm earlier fire at 12-13. Let me carefully construct row14: `#.###.....FF......WW......##.#`? I'll count in code later; simpler to build the map array in JS with strings and just be careful.

Actually, simplest: write map lines and count each to 30 chars. Let me write them:

```
"##############################",  row0
"#............................#",  row1
"#.T..........................#",  row2
"#.####.......................#",  row3
"#............................#",  row4
"#............................#",  row5
"#.....######.................#",  row6
"#............................#",  row7
"#..................E.........#",  row8
"#...........#####.#####......#",  row9
"#............................#",  row10
"#............................#",  row11
"#.....#####..................#",  row12
"#.P......................o...#",  row13
"#.###.....FF......WW....######",  row14
"##############################",  row15
```

Check row2: # . T then 26 dots then # = 1+1+1+26+1=30 ✓. Trophy at col2, platform row3 cols2-5 ("#.####" = #,.,#,#,#,# → cols2-5 solid ✓).

row6: "#.....######.................#" = 1+5+6+17+1=30 ✓ platform cols6-11.

row8: "#..................E.........#" = 1+18+1+9+1=30 ✓ E at col19.

row9: "#...........#####.#####......#" = 1+11+5+1+5+6+1=30 ✓ platforms cols12-16 and 18-22.

row12: "#.....#####..................#" = 1+5+5+19+1=31 ✗. Fix: "#.....#####.................#" =1+5+5+18+1=30 ✓ platform cols6-10.

row13: "#.P......................o...#" = 1+1+1+22+1+3+1=30 ✓. P col2, o col26.

row14: "#.###.....FF......WW....######": 1+1+3+5+2+6+2+4+6 = 30 ✓. Cols: 0#,1.,2-4#,5-9.,10-11F? Let me index: pos0 '#', pos1 '.', pos2-4 '###', pos5-9 '.....' (5 dots), pos10-11 'FF', pos12-17 '......' (6 dots), pos18-19 'WW', pos20-23 '....' (4 dots), pos24-29 '######'. So fire at 10-11, water 18-19, wall cols24-29 at row14 (6-wide raised block). Enemy at row13 col26 walks on top of that wall block (row14 cols24-29 solid), patrols, turns at edges (col24 left edge — ledge detect turns it around). Good, contained patrol.

Hmm, but the player needs to reach the right side? Exit is in the middle-upper area. Player path: start row13 col2 → jump right to platform row12 cols6-10 (from start platform cols1-3 at row14 top... player standing on row14 tiles, top of row12 platform is 2 tiles up from row14 top; horizontal gap cols4-5 = 2 tiles. Jump from col3 edge: fine.

From row12 platform → row9 platform (cols12-16): 3 up, gap cols11 (1). Fine.
From row9 cols12-16 → row9 cols18-22: 1-tile gap, same level. Fine. Exit above at col19.
From row9 → row6 platform (cols6-11): 3 up, jump up-left; row6 right edge col11 aligns above gap col11... from left edge of row9 platform (col12) jump up-left to col11 top of row6 platform: fine.
From row6 platform → row3 trophy platform (cols2-5): 3 up, gap cols... row6 cols6-11, row3 cols2-5: adjacent (col5 next to col6). Jump up-left from left part of row6 platform. Fine. Grab trophy at row2 col2.
Then descend (fall) back and go to exit. Drop from platforms — safe (no fall damage).

Ground hazards: fire at 10-11 row14 sits on ground row15. Player crossing ground must jump over 2-wide fire — easy. Water 18-19 same. Water is hazard = death on touch.

Enemy on ground right block patrols cols24-29 area (on top of wall). Also maybe a second enemy on row12 platform. Add one enemy on row12 platform: row11 col7 'o'? Platform row12 cols6-10; enemy walks on top (row11), patrols, turns at ledges. Add:

row11: "#......o...................#" → 1+6+1+22+1 = 31 ✗. Need 30: "#......o..................#" = 1+6+1+21+1=30 ✓ (o at col7).

Also the first enemy 'o' row13 col26 patrols the wall block.

Now physics: tile 32px, canvas 960x512. Player size 20x28. Gravity 0.6, jump vel -12.5 → height = 12.5²/(2*0.6) ≈ 130px ≈ 4 tiles. Horizontal speed 3.2. Airtime up ~21 frames, total ~42, distance ~134px ≈ 4.2 tiles. 3-tile gap jumps fine, 3-up fine.

Collision: AABB vs tiles, resolve x then y. Hazards: check overlapping tiles F/W → die. Enemy collision → die. Trophy overlap → collected. Exit overlap → if trophy, win; else show message "You need the trophy!" (visible feedback) and keep playing.

Drawing procedurally: 
- solid: brown/gray brick with darker border, little mortar lines.
- fire: animated flickering triangles/orange glow.
- water: blue with animated sine wave.
- trophy: gold cup.
- exit: door (green when trophy? door with sign).
- enemy: red creature with eyes, moving.
- player: Dave-like — red shirt, blue pants, face. Simple shapes.

UI: header text with controls, status (Trophy: yes/no), restart button + R key. Win/lose overlays with restart.

Camera: level fits exactly 960x512, no scroll needed.

Restart resets player pos, trophy, enemies, state. Bind R and button.

Let me write the code now. Keep it compact but complete.

Enemy update: move vx; check ahead tile at foot level for wall, hazard, or ledge (no solid below ahead) → reverse.

Edge cases: player standing on one-tile platform; jump only when grounded (onGround set during y-collision when landing from above).

Exit feedback: message shown with timer when touching exit without trophy.

Write index.html then test in browser: screenshot, simulate keys (left/right/space), check console errors.

Let me write it.

Now test in browser. Check initial screenshot and console.

The screenshot shows something wrong: the platforms render as a diagonal staircase of single tiles, and fire/water/ground aren't visible. It looks like each row string is being mis-parsed — actually it looks like the map rows are shifted: a diagonal of tiles from top-left to bottom. That suggests each row string length differs, or... Wait, the diagonal pattern suggests the grid is read with wrong indexing — maybe rows drawn correctly but my map in the file is different from what I wrote? The player is at bottom-left (correct), enemies correct, trophy top-left area, exit center-right at row ~7. But solid tiles form a staircase diagonal — that's not my map. My map has row0 all solid at top, row15 bottom solid. But the screenshot shows no top/bottom borders!

Ah — I see. The diagonal suggests rows got progressively offset. Could be that `drawTile` is fine but... Actually wait, look again: tiles appear at increasing columns per row — like grid[r][r]. That would happen if COLS is used but rows are longer... Hmm, no.

Actually maybe the issue: the map strings contain '.' characters but the canvas renders only '#' correctly... no, borders missing.

Wait — maybe the HTML file got written differently, or browser cached an old file? This is the first load. Let me read the actual written file to check the LEVEL array. Perhaps my write produced something different. Actually, look at the pattern: first visible tile at top-left corner, then descending. If each row were right-shifted by... The diagonal goes down-right one tile per row. That's consistent with tileAt(c,r) returning grid[r][c] but drawing at (c*TILE, r*TILE) — correct. Unless strings are being indexed as strings vs arrays — fine.

Hmm, could the LEVEL rows have been altered? Let me read the file.

The file looks right. But the screenshot shows a diagonal staircase — that's bizarre. Wait... look again at the screenshot: tiles descending from top-left. Actually maybe the screenshot was rendered from a *different* page? The canvas is 960x512 but appears ~970x520 at scale. Hmm.

Actually wait — maybe the diagonal IS from my map but rows are shifted because... no. Row0 is all '#' and should draw a full top border. The screenshot shows no top border at all, and tiles appear at positions like (0,0),(1,1)... which would be the case if grid[r][c] = '#' when c≈r? That means the strings were indexed with... hmm, if tileAt used grid[c][r] (transposed)... transposed map: column 0 of my map is "################" (all '#') → row... if we transpose, grid[r][c] where we actually store rows; tileAt(c,r)=grid[c]?? No, code is grid[r][c].

Hold on — could the browser be loading a different index.html (e.g., cwd vs browser's served file)? The heading matches my content ("DANGEROUS DAVE-STYLE PLATFORMER", controls, Trophy: NO, Restart (R)). So it's my file.

Look more carefully at the screenshot: I see a diagonal staircase AND it's missing... hmm, also the player at (200,555) which is col~2.7, row~13.9 in tile coords — matches start. Enemy at (365,495) → col 11, row 11 — matches 'o' at row11 col7? No, col 11.4. Hmm wait 365/32 = 11.4, but 'o' row11 is at col7. 7*32=224. Doesn't match. So the rendering is scaled? Canvas CSS width 960 but the screenshot shows the canvas spanning x=116..1084 = 968px wide in a 1200px viewport, roughly 1:1. 

Actually — wait. If drawn scaled by factor ~1.6? 960 canvas → 968 shown, no.

Enemy at x≈365: if enemy spawned at col 7 → 224+4=228. Not matching. Unless enemy x got multiplied by 1.6: 228*1.6=365! And player at 70*1.6=112? Player shown at x≈200. Player x=2*32+6=70... 70*1.6=112, shown ~200. No.

Let me think differently: maybe the canvas internal coordinate system is fine but my parse is wrong. Diagonal staircase: tiles at (col, row) pairs: (0,0),(1,1),(2,2),(2.5?,2)... Actually staircase of 2-wide steps. This looks like the map got shifted right by one column each row — i.e., row r rendered with c offset +r/2? 

OR: TILE mismatch — drawn with TILE=32 but positioned with TILE=... if drawTile uses x=c*TILE but grid parsed from strings where I iterate... it's straightforward.

Hmm, alternative theory: the screenshot tool rendered a *scaled* canvas? No, DOM text matched.

Let me just reload and re-screenshot to rule out a transient. Actually, maybe the issue: `drawTile` reads grid[r][c] where grid was MUTATED by init (replacing P,T,E,o with '.'). That's fine.

Wait wait. Look again: is it possible that the visible diagonal is actually my map rendered with row index multiplied... Let me enumerate expected solid tiles near top-left: row0 all solid → full horizontal bar at top. Screenshot shows only one tile at top-left. So row0 string apparently only has '#' at col0 and '.' elsewhere?? That would be the case if the string were indexed beyond its length... if COLS were larger than string length, grid[r][c] returns undefined for c≥30 — fine, not '#'.

Unless... the strings in the actual served file contain different content — e.g., the browser is loading index.html from a different directory (the browser tool may serve from its own cwd). The DOM text matches because the DOM text came from the same page obviously. Hmm.

Actually — could the browser have run an older cached version? First load though.

Let me test directly in node: parse the map and simulate a few frames to verify geometry logically. And also re-screenshot after reload.

Same wrong render after reload, and map data is correct. So the browser must be running different code than the file I wrote... OR the browser tool is showing a screenshot from a different index.html (maybe it serves a directory listing or a different project). The DOM text matches mine though.

Hmm wait — look at the image again very carefully. The staircase: tiles at (0,0),(1,1),(2,2)... two tiles wide per step. And there appear to be exactly ~16 steps descending across 16 rows. This is EXACTLY what you'd get if tileAt(c,r) checked `grid[r][c]` but the strings were... no.

What if `grid = LEVEL.map(r=>r.split(''))` and then in drawTile I use `grid[r][c]`, but the inner draw loop is `for(let r=0;r<ROWS;r++)for(let c=0;c<COLS;c++) drawTile(c,r);` — fine.

What if TILE is being overridden? ctx transformations? No transforms used.

Could the browser be executing a *different* index.html — perhaps the tool has its own fixture and the DOM text coincidentally matches? Impossible coincidence.

Alternative: maybe there are TWO canvases... The DOM dump only lists text, not elements fully.

Hmm, could the screenshot be stale/wrongly composited? Player position (200,555): player x=70 → screen 116+70=186, close to 200 considering sprite width. y=13*32+4=420 → 120+420=540, shown 555 (with h=28 bottom 568 vs ground at... wait ground row15 top at 480+120=600; player bottom at 540+28=568 — floating 32px above ground? Player starts at row13 (y=420), falls until standing on row15? Row14 cols 2-4 is '###' platform → player at col2 stands on row14 top = 448+120=568 screen. Bottom of player 568 ✓. So player rendered correctly per my map!

Enemy pink at (365,495): enemy1 spawn col7,row11 → x=228 → screen 344, y=11*32+6=358→478, shown ~495. Close-ish ✓ (it patrols). Enemy2 at (940,555): col26 row13 → x=836 → 952 ✓.

Trophy at (200,205): col2 row2 → x=64+16=80→196 ✓ y=2*32+16=80→200 ✓.

Exit at (745,390): col19 row8 → x=608→724, door spans y-14..  y=256→376 ✓.

So entities ARE positioned per my map! Only the solid tiles render wrong — as a diagonal. So grid parsing of '#' positions is wrong while P/T/E/o positions parsed right... but they come from the same loop! Unless... the mutation `grid[r][c]='.'` happens for P/T/E/o, and solid drawing uses `tileAt`... drawTile uses `grid[r][c]` directly.

Wait — actually is it possible the diagonal tiles ARE my solid tiles but drawn with swapped/strided coords? Tile positions on screen: step tiles at (135,135),(160,160),(185,185)... roughly diagonal at 45°. My map's '#' cells: row0 cols0-29 would be a horizontal line. A diagonal would result if x=c*TILE + r*something... e.g., if drawTile received (c,r) = (loop c, loop r) but I called drawTile(c, r) while its signature is drawTile(c,r){const x=c*TILE,y=c*TILE...}? No, it's x=c*TILE,y=r*TILE.

Unless the browser is running OLD JS from cache while HTML is new?? But first load.

Hmm, hold on. Maybe the browser tool injects the page differently — maybe it ran my JS but `LEVEL.map(r=>r.split(''))` with strings containing multibyte? The '←' chars are in HTML not map. Map is ASCII.

Let me actually debug in the live page: use browser inspect to run JS? The inspect tool shows DOM/console. Let me try evaluate via address bar? Can't. Alternative: add a debug draw... Actually, maybe the problem is the canvas gradient + something? No.

Wait, actually re-look at the screenshot: could those brown tiles be... my brick tiles drawn at wrong positions because `drawTile` is called with (c,r) but I wrote `for(let r...)for(let c...) drawTile(c,r)` — that's right...

OK, different approach: is it possible the browser rendered an entirely different implementation — like the environment pre-seeded index.html with something, and my write failed to be served (serving from another cwd)? The browser tool said "Run index.html" — from current directory presumably. DOM text matches my file exactly, including "Trophy: NO". If it served a different file, the text would differ.

So my code produced that. How can grid[r][c] give a diagonal? OH WAIT. I see it! In `init`, when scanning for P/T/E/o, I do `grid[r][c]='.'` — mutating. Fine. But `drawTile` — hmm no.

Actually, let me look at the diagonal more precisely. Steps: (0,0), then (1,1),(2,2)?? The steps look 2 tiles wide: positions ~ (130,130)-(155,155), (155,155)-(180,180)... Honestly, a staircase 2 wide, 16 steps → 32 tiles wide, 16 tall. This smells like: drawing '#' where c == r*2-ish. Which cells in MY grid satisfy c≈2r? Row3 has cols2-5... row6 cols6-11... row9 cols12-16,18-22... row12 cols6-10... row14... no.

What about TRANSPOSED? tileAt(c,r)=grid[c][r] would give: for each "row" r (which is actually column c of map), tiles where column c has '#'. Column 0 of map = "################" → all rows → a full vertical bar at left. Not diagonal.

Diagonal = grid[r][c] is '#' when f(c,r)... The union of my platforms: row3 cols2-5 (a step), row6 cols6-11, row9 cols12-22, row12 cols6-10, row14 various... That union is NOT a clean diagonal.

Hmm, unless the browser is showing an OLD screenshot?! Both screenshots identical pixel-wise? The enemies would have moved (patrol at 0.9px/frame). Enemy positions identical in both screenshots. And the "motion"/time... Both taken at frame 1 (+0ms). Maybe screenshot always reloads fresh. OK.

New idea: maybe my JS has an error that prevents my draw from running, and the canvas shows... no, canvas would be blank.

Actually — maybe the issue is `requestAnimationFrame` first frame: draw happens with grid... no.

Let me just add explicit debugging: draw grid coordinates as text? Better: use browser "inspect" to see if there's a console error... The console only showed the sandbox warning. So no errors.

Hmm wait, actually — maybe THE BROWSER TOOL SERVES A DIFFERENT index.html. The DOM text output is from... the same page. My text is unique enough ("DANGEROUS DAVE-STYLE PLATFORMER"). Fine.

Let me think about `drawTile` again:

```
function drawTile(c,r){
  const x=c*TILE,y=c*TILE,t=grid[r][c];
```

Did I write y=r*TILE? In my write call: `const x=c*TILE,y=c*TILE,t=grid[r][c];` — let me check! Looking at my written code: "const x=c*TILE,y=c*TILE,t=grid[r][c];" Hmm I don't remember. Let me grep the file!

Found it: `y=c*TILE` should be `y=r*TILE`. Fix.

The level now renders correctly: borders, platforms, trophy (top-left on platform), exit door (center), fire (bottom center-left), water (bottom center-right), two enemies patrolling, player at start.

Now test movement and jump. Use key actions: press ArrowRight for a bit, then Space jump, screenshot. The browser key action likely sends a key event. I'll do: key ArrowRight (hold?) — the tool probably sends a keydown/keyup. Movement requires held keys; a single press may move little. Let me try sequence: key "ArrowRight" then screenshot, then "Space" then screenshot. Let's do key + motion to capture movement.

Player didn't visibly move (single keypress = one keydown/keyup, maybe a frame or two of movement — player appears same spot, maybe slightly). Hard to test held keys with this tool. Enemies did move (patrolling). 

Better: verify logic in Node by simulating the game loop with held keys. I can extract the JS and simulate headlessly — but DOM dependencies. Alternative: write a quick simulation harness in node replicating physics? That duplicates code.

Alternative approach: use the browser "type" or multiple key events? The key tool may support holding via repeated calls. Each key call showed "Frame 1" — seems each action reloads? Actually "Frame 1, +0ms" each time suggests fresh capture each action, but state persists (enemies moved between screenshots earlier... in the two screenshots enemy at row11 platform moved slightly from x≈365 to similar; hard to tell).

Let me instead do a headless logic test with node by stubbing DOM/canvas. I'll extract the script and run with stubs: document.getElementById returns objects with getContext returning a Proxy no-op, addEventListener captured, requestAnimationFrame manual stepping. Then simulate keys: set keys via captured keydown handler, step frames, inspect player position via... player is inside IIFE — not accessible. I could expose for testing: attach window.__game = {player, init, ...}? Small addition, harmless. Let me add a debug hook and run node test.

The ctx stub's createLinearGradient returns undefined; fix stub to return a gradient stub. Use a Proxy that returns functions that return the proxy itself.

Interesting: settle y=420 — player started at y=420 and stayed (standing on row14 platform, y should be 14*32-28=420 ✓). Jump peak delta -8.8 after 10 frames?? That means the jump didn't happen — because I pressed Space after releasing ArrowRight... wait sequence: move right 30 frames (dx=96 → moved to x≈166, col~5... hmm start platform cols1-3 (row14 solid), player at x=166 → col 5.2, row14 col5 is '.' so player would fall to ground row15 top → y=15*32-28=452. Indeed "landed y=452" — so after moving right, player fell off the start platform to the ground (fine). Then Space press: jump peak delta measured as y0(452)-yMid → -8.8?? That means yMid = 460.8, i.e., player went DOWN? Because... after release('ArrowRight') then press('Space'), step(10): jump should rise. y went down 8.8 — meaning jump didn't trigger and player... was falling? At step time player was mid-fall from platform edge? We released ArrowRight after step(30), and x0 was measured at settle y0=420 (on platform). Then "press Space, step 10" — during those 30 frames of moving right, the player walked off the platform (col3 edge at x=128... wait platform row14 cols2-4? Map row14: "#.###.....FF..." → cols2-4 solid. Player starts col2 (x=70). Moving right: leaves platform at x>... platform spans x=64..160. Player w=20, so falls when x>160-... Actually falls when no solid below: at x≈166 dx=96 ✓ fell. During fall he landed on ground (y=452) — but when did he land? dx=96 at end of 30 frames; fall from y420 to 452 = 32px takes ~10 frames... Timeline: 30 frames move right at 3.2 = 96px, falling begins when player's right... he needs x+w past... falling when left edge passes col4 right edge (x=160)? bottom row check uses c0..c1 of player span. Player leaves support when x>160 → after ~28 frames. So at end of move-right step he just started falling. Then Space pressed while airborne → no jump (grounded-only, correct!). Then he falls and lands at 452.

So the test's jump press happened mid-air — game behavior is correct (jump only while grounded). My test sequencing is at fault: after landing at 452 I should press Space again. Also note y0 measured =420 on platform.

Adjust test: after landing (onGround true), press Space and measure. Let me rerun with fixed sequence: settle → jump in place → move right → wait land → jump again. Also verify climb onto row12 platform.

All logic tests pass. Now do a final live browser check: restart button, and a quick visual of a jump. Also verify the whole route is reachable — I tested climb to row12 platform. The remaining route (row12→row9→exit, row9→row6→row3 trophy) — jumps are ≤3 up with small gaps, jump rises 118px (3.7 tiles) so fine. Could simulate the full climb but timing-based key sequences are fiddly; geometry analysis: row12→row9 = 3 up, gap col11 (1 tile) — fine. row9→row9 gap 1. row9(cols12-16)→row6(cols6-11): 3 up, up-left, overlap at col11-12 — player can jump nearly straight up from col12 edge? row6 platform spans cols6-11; from row9 platform left edge (col12), jumping up-left: need to travel left ~1 tile while rising 3 — fine. row6→row3 (cols2-5): 3 up-left, adjacent columns — fine.

Let me do one live-browser check: click Restart button and screenshot, plus press R. Also final screenshot. Then done. Also quickly check console is clean.

Player at start, enemies have patrolled to new positions. Now click Restart button at (600,665) and confirm reset.

Restart worked: enemies returned to spawn positions (left enemy back at col7, right at col26), player at start, Trophy: NO. Console clean. Done — final report.