One AI prompt, one dungeon crawler — what an agent can do when it can actually see and control the game engine

I connected an LLM agent to my Godot 4 editor with the mcp tool i am building and gave it a single task: build a dungeon crawler FPS using Kenney's dungeon kit. It built the whole thing without me touching the editor. 3 rooms connected by corridors, atmospheric torch lighting with particles, FPS controls with head bob, sword combat, 4 enemy types with pathfinding, wave system, loot drops, XP progression, game over screen. The interesting part isn't that it wrote code,any LLM can do that. It's that it could run the game, take screenshots, see what was wrong, and fix it.