Non-programmer builds a game in 4 days: Claude wrote a 28,000-line TypeScript engine from scratch
ZedTheEvilTaco · reddit · 2026-09-28
A Reddit user who barely understands GitHub used Claude (Opus 5.5) to build the first level of a 2D platformer, Echo, in 4 days — with a free browser-playable demo.
Key facts:
- No existing game engine — Claude wrote one from scratch, about 28,000 lines of TypeScript
- Characters designed in ComfyUI (with one Gemini assist), then turned into 2D spritesheets by Claude; the world is drawn entirely at runtime for live level editing; all sounds are synthesized
- 3D assets made with Meshy; music generated with Suno, with MIDI/WAV stems fed to Claude and played through a synthesizer
- The author upgraded from Claude Pro to Max to keep working within limits
The game stars Echo, an AI vtuber who streams her adventures and reacts to a live scrolling chat. A striking case of a non-programmer shipping a full game with an AI toolchain.
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