WorldX generates a complete AI world from one sentence — maps, character sprites, backstories, all original art, not templates. Hit play and AI agents live autonomously: decisions, conversations, memories, reflections, emotions. No scripts — stories emerge naturally. Core trick: a "paint-then-diff" method that lets image models locate objects in their own art precisely, without vision models. TypeScript, Phaser 3, React, SQLite. MIT. Any OpenAI-compatible API.