This is so cool! I've been working on trying to minimize the F-zero render loop to fit on gameboy and multiplayer over the link cable...it's been a journey. (I rushed the writeup cus of this article--still polishing the text), but give the game a try on the in-browser emulator: https://fireflyk64.github.io/makingfsub/
This is really great, thank you for sharing. I may borrow this technique for a Playdate project in the future.