Welcome
Umicat is a vibe-coding game studio. Describe a game, and an AI agent builds it in real time — with a live preview you can stop, edit, and steer at any point.
Umicat is a vibe-coding game studio. You describe the game you want in plain language, and an AI agent builds it in real time — with a live preview you can stop, edit, and steer at any point.
These docs walk through the platform's surface: building games with the agent, working in the visual editor, managing assets, wiring per-player save data, launching online multiplayer, publishing, and inviting collaborators.
Start here
Quick start
Sign up, describe a game, publish it — in under five minutes.
Create your account
Email or Google sign-in, plus what onboarding asks for.
Plans and credits
How credits work, what each turn costs, and how to top up.
Prompting best practices
How to talk to the agent so it builds what you actually wanted.
Build a game
Your first game
From a single sentence to a playable prototype.
Iterating with the agent
Refine in chat, screenshot, paste, repeat.
The editor
Edit vs Play, the Inspector, the Scene tab, the Assets tab.
Assets
Upload, browse the library, generate with AI, manage spritesheets.
Tilemaps
Paint terrain, configure tilesets, wire collision.
Animated tiles
Water flow, lava bubble, torch flicker — one click each.
HUD scenes
Score text, hearts, buttons, progress bars, panels.
AI image generation
Generate sprites, backgrounds, and animation frames in-app.
Platform features
Save data
Per-player saves + per-game shared data, with no backend code.
Online multiplayer
Real-time rooms via the realtime service.
Connectors
Pull assets from external tools like Figma.