I made a low-poly Google Earth with Claude

https://play.lowpolyearth.online/ It took around 80 days to build starting with Claude Opus 5.4 then Fable 5, then Astra, and finally finishing with Opus 5.5. The world is built using open street map and elevation data, and the app is written in Rust. I initially made it a native mac app but then ported it to be an online app. Because of the nature of this app I spent a lot of the time of squeezing as much performance out of it as I could by repeatedly prompting the models. They don't always find the right thing to optimize so at first I would suggest a direction or area to optimize and let Claude figure out what to do. But as always what worked best was telling Claude to thoroughly profile the app and help me understand what are the main bottlenecks. That helped me suggest better directions for optimization. Though no doubt in a generation or two it can figure out the best opportunities to optimize without any guidance from me. For the native app: http://lowpolyearth.online/ Let me know if you have any questions about the development process.