Through a conversational interface, you direct the game by typing what you want to build. Google says you can start from a blank canvas, remix starter prompts or use guided support to shape your concept, then test it straight away. Tweaks such as adjusting the physics or rewriting elements are made by asking, not programming. Users can test their creations offline or share them with friends via a link.

A more advanced version of the same idea is also on the way. Unity Spark, built in partnership with Unity, will launch later this year as a browser-based tool for generating 3D games from text prompts, drawing on assets from the Unity Asset Store. Unity CEO Matt Bromberg framed it as a tool for building "real, unique interactive experiences" rather than asking AI to "regurgitate an already invented game".

Google is not alone in this push: in late September, Meta announced its own AI prompt tools for building games, Horizon Create on mobile and Horizon Studio in the browser, for its Horizon social platform.