evading-demons

Prompt

Build a browser-playable 3D survival game in JavaScript where the player controls a third-person character running through a shopping mall.

The game should ship as a committed HTML document that an evaluator can open and play immediately in the browser. You can use plain HTML/CSS/JS, Three.js, or any other browser-friendly stack, but the final experience should feel like a small, coherent game rather than a tech demo.

The core brief:

1. A third-person playable character that can run around the world and jump.
2. Arrow key navigation for movement.
3. A shopping mall environment with a clear solarpunk aesthetic during the day.
4. A dynamic lighting transition where the mall shifts into a dark, space-like atmosphere at night.
5. Obstacles in the environment that materially affect navigation.
6. Demons / enemies that pursue the player and cause immediate death on contact.
7. A clear lose state and a way to restart so the evaluator can play multiple runs without editing code.

Acceptance criteria

A submission passes if a fresh evaluator can:

1. Clone the repo, cd into the solution directory, and follow the solution README.md.
2. Open a committed HTML file directly in the browser, or via a single documented static-file command if needed.
3. See a working third-person game scene with a controllable player inside a mall-like space.
4. Use the arrow keys to move and Space to jump.
5. Observe the environment transition from a solarpunk daytime look into a darker, space-like nighttime mood as lighting changes.
6. Encounter obstacles that block or meaningfully shape movement.
7. Be chased by demons that can catch the player.
8. Die immediately when a demon touches the player and be able to restart.

Ship a committed playable HTML

Every submission must include at least one committed, browser-playable HTML file inside the solution directory. The solution README.md must link to it near the top so the evaluator can open the game immediately.

This is a hard requirement. If the only way to play the game is to install dependencies first or run a build step before any HTML exists, the submission does not pass.

Out of scope

• Combat, weapons, or killing demons.
• Audio, voiceover, or music.
• Story progression, quests, inventory, or save systems.
• Multiplayer, networking, or leaderboards.
• Mobile controls.

Notes for evaluators

This eval is intentionally about shipping a playable browser game quickly while still making clear design choices. A polished small game with readable controls, coherent atmosphere, and a committed HTML artifact is better than a sprawling prototype with missing edges.

Solutions live under <harness>-<model>/ subdirectories. Each is self-contained.

Current solutions:

• [codex-gpt-4-5-xhigh/](./codex-gpt-4-5-xhigh) — Codex + GPT-4.5 (xhigh). Project name: heliomall-escape.
• [claude-code-opus-4-7-1m/](./claude-code-opus-4-7-1m) — Claude Code + Opus 4.7 (1M context). Project name: verdant-bazaar.
• [cursor-gemini-3-1-pro/](./cursor-gemini-3-1-pro) — Cursor + Gemini 3.1 Pro. Project name: lumina-atrium.