Edinburgh founder builds playable 3D city game using GPT-6 in 37 minutes
Simon Crack, founder of Edinburgh-based KlipZi, says a single AI prompt produced a browser-playable 3D game in well under an hour, highlighting how fast generative AI tools are moving for small businesses and solo creators.
AI-built game goes live in browser
An Edinburgh entrepreneur has demonstrated the rapid capabilities of the latest generation of AI models by creating a playable 3D city game using a single prompt to GPT-6.
Simon Crack, founder of KlipZi, said the project, named KlipZi City, took just 37 minutes from prompt to a working, browser-based game. The finished product includes a full 3D city, four playable jobs, driving mechanics with jumping and drifting, car damage effects, an in-game currency system, challenges, and a time-travel feature that shifts the city’s setting between 2026, 1996 and 1986.
Crack, who has been building online businesses since 2009, said the exercise was prompted partly by GPT-6 launching ahead of the long-awaited video game Grand Theft Auto 6, leading him to try building his own city-based game using AI.
Wider implications for small business
While Crack was clear that KlipZi City is not intended to rival major commercial game titles, he said the more significant story is what the speed of AI-assisted development means for small businesses and independent creators. He argued that ideas which might once have required significant time, budget or technical teams can now be turned into testable, functioning products in a matter of hours.
Crack said he is willing to share further details on the project, including the original prompt used, screenshots and a gameplay clip, and to discuss in more depth what GPT-6 handled well during the build process and where human input was still required to refine the result.
The game is currently accessible via a browser link shared by Crack, who is based in Edinburgh and runs KlipZi.