Its a javascript game that runs in browser, packaged in an Electron app. Runs like butter at 60fps. Cursor wrote 95% of the logic, I did all of the animations and UI. https://store.steampowered.com/app/4257080/Portal_Guardian/
very cool! i'm working on a game rn too trying to build demand for it before it get's released got an email list of like 300+ people interested in playing it, gonna launch it when i get 2000+ email subscribers to give me enough time to finish it