Vibe-code a 3D town-building game with Claude Code

Our rewrite with extra checks. The poster didn't test it.

Goal: Make a browser 3D game where I place different buildings and then drive a car through the town I built.

Inputs (fill in or confirm):
- Where it runs (browser) and controls (keyboard/touch)
- How many building types to start with
- Any style (low-poly, cartoon)

Rules:
- Use a single HTML file with a well-known 3D library loaded from a CDN.
- Two modes: build mode (place/rotate/remove buildings on a grid) and drive mode (simple car physics, collisions with buildings).
- Show on-screen help for controls.
- Keep it running smoothly on a laptop; limit object counts if needed.
- Save the town layout in the browser so it survives a refresh.
- Make it run by opening one HTML file, no install.
- Keep frame rate smooth; tell me if adding features slows it down.

If you get stuck: If something breaks, keep the last working version and explain what you changed. If a login, CAPTCHA or two-step code appears, stop and ask me to handle it; never guess or store passwords.

Verify before you finish: Play-test: place five buildings, switch to drive mode and drive around without falling through the ground.

Output: The game file, controls list and known limitations.

Done when: I can build a small town and drive through it in one session.