Wow! This is my dream game. I did some work in something similar, but it was just a prototype full of spaghetti code. My idea was to make a multiplayer retro top-racing game where you try to beat others best laps. With ghost cars, and this kind of stuff. Please, finish it!
This was my old attempt to create something similar: https://xa.bi/car2/
Por cierto, me acabo de dar cuenta que eres "de por aquí". Saludos apañero.