Every demo below was produced by Beast Max in a single response - one prompt, no follow-ups, no edits, no human fixes. Each is a self-contained HTML file using Three.js 0.180.0 and cannon-es 0.20.0. Open any demo to play it, and expand the prompt to see exactly what was asked. The model and the reasoning_effort and web search settings used are listed with each.
These are desktop-only and run best in a modern Chromium browser with keyboard and mouse.
Synthwave Off-Road Rally
Beast Max
reasoning: yolo
web search: High
A drivable off-road rally with suspension physics, ramps, AI opponents in distinct vehicles, lap timing, an airtime-based score, and an 80s synthwave soundtrack.
Show prompt
Build a desktop-only 3D off-road driving game in one HTML file using Three.js 0.180.0, cannon-es 0.20.0 and any external libraries as needed.
Include a drivable vehicle with suspension-like behavior, ramps, uneven terrain, collectible checkpoints, lap timing, crash recovery, dynamic camera follow, and a scoring system based on speed and airtime. Add AI racing opponents each with different vehicules with collision detection. Use procedural terrain or generated track geometry. Add procedural vegetation, buildings and other points of interest along the track. Add sound and 80s style videogame music.
Mech Assault
Beast Max
reasoning: yolo
web search: High
A mech combat game with legged-movement approximation, turret aiming decoupled from the body, enemy line-of-sight checks, overheating weapons, and destructible cover.
Show prompt
Generate a one-file desktop mech combat game using Three.js 0.180.0, cannon-es 0.20.0 and any external libraries as needed. Include legged movement approximation, turret aiming separate from body rotation, enemy line-of-sight checks, overheating weapons, destructible cover, and an animated damage state. Use procedural terrain, vegetation, buildings and other points of interest along the track. Add sound and music.
Mech Combat — deeper reasoning
Beast Max
reasoning: XHigh
web search: Medium
The same prompt as Mech Assault above, run with reasoning_effort turned up to XHigh and lighter web search — a side-by-side look at how deliberation depth changes the result.
Show prompt
Generate a one-file desktop mech combat game using Three.js 0.180.0, cannon-es 0.20.0 and any external libraries as needed. Include legged movement approximation, turret aiming separate from body rotation, enemy line-of-sight checks, overheating weapons, destructible cover, and an animated damage state. Use procedural terrain, vegetation, buildings and other points of interest along the track. Add sound and music.
Demolition Tower
Beast Max
reasoning: yolo
web search: High
A physics-heavy demolition mini-game: launch projectiles at a tower of stacked rigid bodies, with chain-reaction score multipliers, debris cleanup, and slow-motion on major impacts.
Show prompt
Build a physics-heavy demolition mini-game in one desktop-only HTML file using Three.js 0.180.0, cannon-es 0.20.0 and any external libraries as needed. The player launches projectiles at a destructible tower made from stacked rigid bodies. Add sounds, score multipliers for chain reactions, debris cleanup, slow-motion on major impacts, and a replay/reset loop.
3D Rotating Flappy Bird
Beast Max
reasoning: yolo
web search: High
A cute third-person 3D take on Flappy Bird with a detailed bird, colorful tubes, a nature backdrop, an FPS HUD, and spacebar controls.
Show prompt
3D Rotating Flappy Bird
Write a HTML-based, 3D cute, third-person perspective, flappy bird game, with rich nature background and colorful tubes, the bird being detailed drawn.
Additional requirements:
1. Need simple sound effect
2. You can use Three.js 0.180.0, cannon-es 0.20.0 and any external libraries as needed but PUT EVERYTHING IN A SINGLE HTML FILE
3. Need to show a mini HUD displaying FPS on the right top corner
4. All datas saved in memory, no need to write into local storages
5. No leaderboard / charts needed. Only need the game itself
6. Make the gap between top and bottom tubes relatively wider, so it's more easy to pass through
7. Can use keyboard spacebar to play (including start/restart the game, jump)
8. 3D, 3rd person perspective from side view of the bird
Mars Silhouette — Astronaut FPS
Beast Max
reasoning: yolo
web search: High
An astronaut FPS on Mars: glowing Martian silhouettes rising from the dust, a cracked-console HUD with oxygen and sonar, a human base, craters, and rocks across the terrain.
Show prompt
Create a 3D shooter FPS game with enemies, health packs, ammo, and a full HUD.
The player is an astronaut on Mars. Enemies are Martian silhouettes with glowing lures emerging from the Martian dust. The HUD is a cracked astronaut console displaying oxygen percentage, harpoon count, sonar blips, etc.
Please ensure the WASD movement is correct.
The environment should include Martian rocks of various sizes (from smaller to larger), a human Mars base (buildings, etc.), and various Martian craters.
Make it truly beautiful and amazing, as if you were trying to impress someone with your coding skills.
Add sound.
You can use Three.js 0.180.0, cannon-es 0.20.0 and any external libraries as needed but PUT EVERYTHING IN A SINGLE HTML FILE.
Union Station — Subway FPS
Beast Max
reasoning: yolo
web search: High
A detailed 3D subway station turned FPS: a brightness slider for the lighting, WASD navigation, humanoid/zombioid enemies, weapon recoil and muzzle flash, and visible ammo tracers.
Show prompt
Make a beautifully detailed web scene using js, of a subway station. It should be 3D and something that would be impressive to you. The scene must feature a brightness slider to control the lighting, as well as the ability to navigate around the scene using WASD.
We want to turn this scene into an FPS with humanoid/zombioid enemies, weapon recoil, weapon flash, and visible ammo tracers.
Add sound.
You can use Three.js 0.180.0, cannon-es 0.20.0 and any external libraries as needed but PUT EVERYTHING IN A SINGLE HTML FILE.
Build your own on the Portal