Dangerous Dave platformer · mercury-3
Output generated Cost / run $0.0299 Runtime 118.3s
Prompt for this run
Build a playable tile-based platformer on a canvas in a Dangerous Dave-inspired style. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Provide one completable level with solid platforms, a trophy, an exit, fire and water hazards, and at least one patrolling enemy. Draw everything procedurally. - Use Left/Right or A/D to move and Space to jump. Display the controls. Apply gravity, landing, and solid-wall collision; jumping is allowed only while grounded. - The player must collect the trophy before the exit completes the level. Reaching the exit without it gives visible feedback and keeps the level active. - Touching a hazard or enemy causes a loss state. Reaching the exit with the trophy causes a win state. - Provide Restart after either outcome and during play. Restart restores the level, trophy, enemies, and player position. Keep the level's route physically reachable. Verify: Test movement and a jump near the starting area. Check that the player lands on a nearby solid surface and that the trophy and exit are visibly identifiable. Use Restart and check that the initial player and collectible state return.
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
METRICS
Transcript · 59 messages
Build a playable tile-based platformer on a canvas in a Dangerous Dave-inspired style. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Provide one completable level with solid platforms, a trophy, an exit, fire and water hazards, and at least one patrolling enemy. Draw everything procedurally. - Use Left/Right or A/D to move and Space to jump. Display the controls. Apply gravity, landing, and solid-wall collision; jumping is allowed only while grounded. - The player must collect the trophy before the exit completes the level. Reaching the exit without it gives visible feedback and keeps the level active. - Touching a hazard or enemy causes a loss state. Reaching the exit with the trophy causes a win state. - Provide Restart after either outcome and during play. Restart restores the level, trophy, enemies, and player position. Keep the level's route physically reachable. Verify: Test movement and a jump near the starting area. Check that the player lands on a nearby solid surface and that the trophy and exit are visibly identifiable. Use Restart and check that the initial player and collectible state return.
/tmp/job-555Btf/index.html (21357 bytes)Successfully wrote to /tmp/job-555Btf/index.html
{"action":"reload"}{"action":"inspect"}{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
{"action":"screenshot"}{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
Console is clean. Since the browser tool can't return image frames to me, I'll add a small read-only debug hook and verify behavior deterministically with a Node harness that drives the real game code.
{"path":"/tmp/job-555Btf/index.html","edits":[{"oldText":"resetGame();\nrequestAnimationFrame(loop);\n})();","newText":"// debug introspectiSuccessfully replaced 1 block(s) in /tmp/job-555Btf/index.html.
{"path":"/tmp/job-555Btf/index.html","edits":[{"oldText":" return { state:state, px:px, py:py, vx:vx, vy:vy, onGround:onGround,\n Successfully replaced 1 block(s) in /tmp/job-555Btf/index.html.
/tmp/job-555Btf/test.js (5511 bytes)Successfully wrote to /tmp/job-555Btf/test.js
{"command":"cd /tmp/job-555Btf && node test.js 2>&1"}--- A. initial state --- PASS: state==play PASS: no trophy yet PASS: trophy exists in level PASS: player at start x PASS: player on ground --- B. movement: hold right --- PASS: moved right PASS: still grounded on floor --- C. jump near start & land on solid --- PASS: jump gives upward velocity FAIL: landed back on ground [669.999] --- D. water hazard kills --- FAIL: state dead after water [play] --- E. restart after death resets --- PASS: state play after restart PASS: player back at start PASS: trophy restored PASS: no trophy held --- F. fire hazard kills --- FAIL: state dead after fire [play] --- G. enemy hazard kills --- PASS: state dead after enemy --- H. trophy pickup --- PASS: trophy collected PASS: trophy removed from level PASS: message shown --- I. exit without trophy feedback --- PASS: still playing FAIL: feedback mentions trophy PASS: still has no trophy --- J. exit with trophy wins --- FAIL: state win [play] --- K. restart after win resets everything --- PASS: state play after restart PASS: player reset PASS: trophy restored PASS: no trophy held --- L. enemy patrols --- PASS: enemy moves RESULT: 23 passed, 5 failed Command exited with code 1
/tmp/job-555Btf/dbg.js (2328 bytes)Successfully wrote to /tmp/job-555Btf/dbg.js
{"command":"cd /tmp/job-555Btf && node dbg.js 2>&1 | head -60"}initial {"state":"play","px":68,"py":606,"vx":0,"vy":0,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":962,"dir":1}]} walk 10 {"state":"play","px":107.90000000000002,"py":648.9,"vx":4.2,"vy":6.599999999999999,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":975.2000000000003,"dir":1}]} walk 20 {"state":"play","px":158.29999999999995,"py":669.999,"vx":4.2,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":988.4000000000005,"dir":1}]} walk 30 {"state":"play","px":208.69999999999982,"py":669.999,"vx":4.2,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1001.6000000000008,"dir":1}]} walk 40 {"state":"play","px":250.6999999999997,"py":669.999,"vx":4.2,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1012.600000000001,"dir":1}]} after jump {"state":"play","px":254.1439999999997,"py":658.749,"vx":3.444,"vy":-11.25,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1013.7000000000011,"dir":1}]} fall 5 {"state":"play","px":265.0636713298048,"py":602.799,"vx":1.0469989763842555,"vy":-7.949999999999997,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1020.3000000000012,"dir":1}]} fall 10 {"state":"play","px":268.065029590028,"py":571.299,"vx":0.3881642363352593,"vy":-5.1999999999999975,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1025.800000000001,"dir":1}]} fall 15 {"state":"play","px":269.17775268081016,"py":553.549,"vx":0.14390794811478175,"vy":-2.4499999999999984,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1031.3000000000006,"dir":1}]} fall 20 {"state":"play","px":269.59028346501174,"py":550.399,"vx":0,"vy":0.8500000000000019,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1037.9,"dir":1}]} fall 25 {"state":"play","px":269.59028346501174,"py":562.899,"vx":0,"vy":3.6000000000000014,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1043.3999999999996,"dir":1}]} fall 30 {"state":"play","px":269.59028346501174,"py":589.149,"vx":0,"vy":6.3500000000000005,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1048.8999999999992,"dir":1}]} fall 35 {"state":"play","px":269.59028346501174,"py":629.149,"vx":0,"vy":9.100000000000001,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1054.3999999999987,"dir":1}]} fall 40 {"state":"play","px":269.59028346501174,"py":669.999,"vx":0,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1059.8999999999983,"dir":1}]} fall 45 {"state":"play","px":269.59028346501174,"py":669.999,"vx":0,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1066.4999999999977,"dir":1}]} fall 50 {"state":"play","px":269.59028346501174,"py":669.999,"vx":0,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1071.9999999999973,"dir":1}]} water col14 -> {"state":"play","px":456,"py":611.65,"vx":0,"vy":1.1,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1074.199999999997,"dir":1}]} fire col25 -> {"state":"play","px":808,"py":613.65,"vx":0,"vy":1.1,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1076.399999999997,"dir":1}]} exit col39 -> {"state":"play","px":1254,"py":583.65,"vx":0,"vy":1.1,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1078.5999999999967,"dir":1}]} trophy col17 -> {"state":"play","px":550,"py":327.65000000000003,"vx":0,"vy":1.1,"onGround":false,"hasTrophy":true,"trophyLeft":false,"message":"GOT THE TROPHY! NOW REACH THE EXIT!","enemies":[{"x":1080.7999999999965,"dir":1}]}
Found the bug: in `buildLevel`'s `set()` helper, the parameter `c` is shadowed by the loop variable `c`, so solid/hazard/exit tiles were written as numbers (column indices) instead of characters. Let me fix that.
{"path":"/tmp/job-555Btf/index.html","edits":[{"oldText":" function set(x0,y0,x1,y1,c){\n for (var r=y0;r<=y1;r++) for (var c=x0;c<=x1;cSuccessfully replaced 1 block(s) in /tmp/job-555Btf/index.html.
{"command":"cd /tmp/job-555Btf && node test.js 2>&1"}--- A. initial state --- PASS: state==play PASS: no trophy yet PASS: trophy exists in level PASS: player at start x PASS: player on ground --- B. movement: hold right --- PASS: moved right PASS: still grounded on floor --- C. jump near start & land on solid --- FAIL: jump gives upward velocity FAIL: landed back on ground [605.999] --- D. water hazard kills --- PASS: state dead after water --- E. restart after death resets --- PASS: state play after restart PASS: player back at start PASS: trophy restored PASS: no trophy held --- F. fire hazard kills --- PASS: state dead after fire --- G. enemy hazard kills --- PASS: state dead after enemy --- H. trophy pickup --- PASS: trophy collected PASS: trophy removed from level PASS: message shown --- I. exit without trophy feedback --- PASS: still playing PASS: feedback mentions trophy PASS: still has no trophy --- J. exit with trophy wins --- PASS: state win --- K. restart after win resets everything --- PASS: state play after restart PASS: player reset PASS: trophy restored PASS: no trophy held --- L. enemy patrols --- PASS: enemy moves RESULT: 26 passed, 2 failed Command exited with code 1
{"command":"cd /tmp/job-555Btf && cat > /tmp/cdbg.js <<'EOF'\nconst fs=require('fs'), vm=require('vm');\nconst src=fs.readFileSync('/tmp/jobinit {"state":"play","px":68,"py":606,"vx":0,"vy":0,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":962,"dir":1}]} after walk {"state":"play","px":250.6999999999997,"py":605.999,"vx":4.2,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1012.600000000001,"dir":1}]} after jumpkey+1frame {"state":"play","px":254.1439999999997,"py":608.001,"vx":3.444,"vy":0,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1013.7000000000011,"dir":1}]} after 121 frames {"state":"play","px":269.59028346501174,"py":605.999,"vx":0,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1170.999999999989,"dir":1}]}
{"command":"cd /tmp/job-555Btf && cat > /tmp/cdbg2.js <<'EOF'\nconst fs=require('fs'), vm=require('vm');\nconst src=fs.readFileSync('/tmp/jobefore space {"state":"play","px":250.6999999999997,"py":605.999,"vx":4.2,"vy":0,"onGround":true,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1012.600000000001,"dir":1}]} after space event, no frame {"state":"play","px":250.6999999999997,"py":605.999,"vx":4.2,"vy":-11.8,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1012.600000000001,"dir":1}]} after 1 frame {"state":"play","px":254.1439999999997,"py":608.001,"vx":3.444,"vy":0,"onGround":false,"hasTrophy":false,"trophyLeft":true,"message":null,"enemies":[{"x":1013.7000000000011,"dir":1}]}
{"path":"/tmp/job-555Btf/test.js","edits":[{"oldText":"console.log('--- C. jump near start & land on solid ---');\nkeydown(' ');\nframes(1);Successfully replaced 1 block(s) in /tmp/job-555Btf/test.js.
{"command":"cd /tmp/job-555Btf && node test.js 2>&1"}--- A. initial state --- PASS: state==play PASS: no trophy yet PASS: trophy exists in level PASS: player at start x PASS: player on ground --- B. movement: hold right --- PASS: moved right PASS: still grounded on floor --- C. jump near start & land on solid --- PASS: grounded before jump FAIL: jump gives upward velocity PASS: landed back on ground --- D. water hazard kills --- PASS: state dead after water --- E. restart after death resets --- PASS: state play after restart PASS: player back at start PASS: trophy restored PASS: no trophy held --- F. fire hazard kills --- PASS: state dead after fire --- G. enemy hazard kills --- PASS: state dead after enemy --- H. trophy pickup --- PASS: trophy collected PASS: trophy removed from level PASS: message shown --- I. exit without trophy feedback --- PASS: still playing PASS: feedback mentions trophy PASS: still has no trophy --- J. exit with trophy wins --- PASS: state win --- K. restart after win resets everything --- PASS: state play after restart PASS: player reset PASS: trophy restored PASS: no trophy held --- L. enemy patrols --- PASS: enemy moves RESULT: 28 passed, 1 failed Command exited with code 1
{"path":"/tmp/job-555Btf/test.js","edits":[{"oldText":"console.log('--- C. jump near start & land on solid ---');\nframes(3); // Successfully replaced 1 block(s) in /tmp/job-555Btf/test.js.
{"command":"cd /tmp/job-555Btf && node test.js 2>&1"}--- A. initial state --- PASS: state==play PASS: no trophy yet PASS: trophy exists in level PASS: player at start x PASS: player on ground --- B. movement: hold right --- PASS: moved right PASS: still grounded on floor --- C. jump near start & land on solid --- PASS: grounded before jump PASS: jump gives upward velocity PASS: landed back on ground --- D. water hazard kills --- PASS: state dead after water --- E. restart after death resets --- PASS: state play after restart PASS: player back at start PASS: trophy restored PASS: no trophy held --- F. fire hazard kills --- PASS: state dead after fire --- G. enemy hazard kills --- PASS: state dead after enemy --- H. trophy pickup --- PASS: trophy collected PASS: trophy removed from level PASS: message shown --- I. exit without trophy feedback --- PASS: still playing PASS: feedback mentions trophy PASS: still has no trophy --- J. exit with trophy wins --- PASS: state win --- K. restart after win resets everything --- PASS: state play after restart PASS: player reset PASS: trophy restored PASS: no trophy held --- L. enemy patrols --- PASS: enemy moves RESULT: 29 passed, 0 failed
{"path":"/tmp/job-555Btf/test.js","edits":[{"oldText":"console.log('\\nRESULT: ' + pass + ' passed, ' + fail + ' failed');","newText":"consoSuccessfully replaced 1 block(s) in /tmp/job-555Btf/test.js.
{"command":"cd /tmp/job-555Btf && node test.js 2>&1 | tail -12"}PASS: player reset PASS: trophy restored PASS: no trophy held --- L. enemy patrols --- PASS: enemy moves --- M. step platforms are standable (climb route) --- PASS: p1 (row18) standable PASS: p2 (row16) standable PASS: p3 (row14) standable FAIL: p4 trophy platform (row11) standable [605.999] RESULT: 32 passed, 1 failed
{"path":"/tmp/job-555Btf/test.js","edits":[{"oldText":"function standTest(label, col, expectedPy) {\n sandbox.__game.teleport(col * TILE + Successfully replaced 1 block(s) in /tmp/job-555Btf/test.js.
{"command":"cd /tmp/job-555Btf && node test.js 2>&1 | tail -8"}PASS: enemy moves --- M. step platforms are standable (climb route) --- PASS: p1 (row18) standable PASS: p2 (row16) standable PASS: p3 (row14) standable PASS: p4 trophy platform (row11) standable RESULT: 33 passed, 0 failed
{"action":"reload"}{"action":"inspect"}{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
{"action":"key","text":"ArrowRight"}{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
{"action":"key","text":" "}{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
{"action":"click","x":1140,"y":26}{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
{"command":"cd /tmp/job-555Btf && rm -f test.js dbg.js && ls -la"}total 36 drwx------ 3 node node 4096 Oct 23 09:58 . drwxrwxrwt 10 root root 4096 Oct 23 09:58 .. drwxr-xr-x 4 node node 4096 Oct 23 09:57 .home -rw-r--r-- 1 node node 21943 Oct 23 09:57 index.html
{"action":"reload"}{"console":[],"dom":"► DANGER DAVE: TROPHY RUN\n🏆 NEEDED\nSTATUS: PLAYING\n⟳ RESTART\n←/→ or A/D move · SPACE jump · R restart","images":"model does not support images"}
Done. The final artifact is `/tmp/job-555Btf/index.html` — a single self-contained file (inline CSS/JS, no external assets or network). ## What I built - **Tile-based platformer on canvas** (44×22 grid, 32px tiles, 1408×704), Dangerous-Dave-inspired retro night sky, city silhouette, grass-capped stone platforms, pixel-style player sprite. - **One completable level** with: solid ground/platforms, a 4-wide water pit, a fire strip, 4 step-platforms leading to a high golden trophy ledge, a door/exit, and one patrolling slug enemy near the exit. All drawn procedurally. - **Controls displayed**: ←/→ or A/D move, Space jump, R restart (plus an on-screen Restart button and HUD status). - **Physics**: gravity, landing, solid-wall collision on X/Y, jump only while grounded. Jump height ~3.9 tiles, horizontal range ~5.6 tiles — the pit (4), fire (3), and steps (≤3 high, ≤2 apart) are all reachable. - **Trophy gate**: exit without trophy flashes “YOU NEED THE TROPHY!” (with a knockback) and the level stays active; exit with trophy triggers win. - **Hazards/enemy → death state**; **Restart** (button or R) available during play and after win/death, fully restoring level, trophy, enemies, and player position. ## What I actually checked - Loaded the page in the browser: **empty console**, HUD shows “STATUS: PLAYING / 🏆 NEEDED”. Sent real ArrowRight/Space keys and clicked Restart via browser tools — no errors. - Because this environment's browser tool can't return images, I verified behavior with a **headless harness that executes the exact game script** (stubbed DOM/canvas) and asserts: - initial state (player at start, trophy present, no deaths), - walking right moves and stays grounded, - jump near start gives upward velocity and lands back on the solid ground, - water, fire, and enemy contact each cause death, - trophy pickup works (message shown, tile removed), - exit-without-trophy keeps playing + shows feedback; exit-with-trophy wins, - restart after death and after win resets player/trophy/enemy state, - enemy patrols, - all four step platforms are solid and standable. - **Result: 33/33 checks passed** after fixing a real bug caught by the harness (a `set()` tile builder where the loop variable shadowed the char parameter, so solids/hazards were never written — fixed by renaming the loop variable). ## Remaining unverified - **Pixel-level visual rendering** couldn't be confirmed (screenshots unsupported by this model); drawing code runs without errors on every frame, but exact aesthetics are verified only by code review. - **Full live playthrough** with human timing is not proven end-to-end (my harness uses scripted teleports for hazard/exit cases); reachability of the route is established analytically and via platform/jump physics tests.