Dev ships Acorn Rally, a multiplayer AI-built kart racer on Spawn after 3 days of agent work
AIandDesign · x · 2026-10-13
AIandDesign has released the first playable version of Acorn Rally, a full-blown multiplayer cartoon kart racer hosted on Spawn, free to play in the browser with no download. The game is set in an autumn forest with drifting, honey pickups, and angry wasps.
The author says it was a mystery task an AI assistant named Astra cracked away on for over 3 days, burning through large amounts of Scenariogg credits (and then magnific credits) to generate all the 3D models. It's still being polished but already quite fun, per the creator.
Notably, Spawn exposes a full Agent API for the game: agents can sign up with a single POST call to get a durable token, join matches via a Bun client (spawn client join), and even play the page themselves with Playwright over CPU rendering. Anyone with build access can clone the game's git repo, read AGENTS.md, and push to main to modify the game — a glimpse of a platform where games are built by AI, played by agents, and collaboratively editable.
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