Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Build a full game (code, art, audio) with AI

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 "result": "I built the game as a single file: `./usecase-runner/runs/17-haiku/work/index.html`. The script passes a Node syntax check, but I have not run it in a browser, so gameplay balance and rendering are unverified.\n\n**How it plays**\n- You hop a capybara up a river, one tile per press, using the arrow keys or WASD.\n- Rows alternate between water with drifting logs and grass banks. Ride a log, or drown if it slides out from under you. Logs carry you off-screen if you ride them past the edge.\n- The goal bank has six dens. Each filled den is worth 100 points, and each new row reached is worth 10. Filling all six clears the level for 500 points.\n- You have 3 lives. Clearing a level raises the lane speed by 15% and shortens the logs, up to a cap of 2.2\u00d7.\n- Game over shows the score, high score and a restart option.\n\n**Requirements**\n- **Title screen:** a Start button, with Enter, Space or a click to start.\n- **Controls:** arrows/WASD to hop, P or Esc to pause, M to toggle music.\n- **Art:** everything is drawn procedurally on the canvas (capybara, logs, water, bushes, dens, splash ripples and particles). No image files or libraries.\n- **Audio:** the AudioContext is created on the first key press or click. Sound effects are hop, splash, den and level-up, plus a game-over tone. Background music is a looping lead, bass and kick generated with oscillators.\n- **Score and difficulty:** score and level are shown in the HUD. Difficulty increases per level as described above.\n- **High score:** saved to `localStorage` under `capybara-crossing-highscore`. Storage errors are ignored, so the game still runs if storage is blocked.\n\n**Choices I made that you may want to change**\n- Each game has 3 lives rather than instant game over on the first splash.\n- Pressing a direction during a hop buffers one input, so quick presses are not lost.\n- The game auto-pauses when the tab is hidden.\n- The title screen shows the lane scene with the logs drifting.\n\nThis is not a git repository, so I did not commit anything.",
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