Hello Becath! Thank you very much for playing my game and for the tips, they are very valuable, from a developer's point of view!
I tried using dynamic lights and shadows, but it drastically affected the game's performance, making it unplayable even when I tried to optimize it lol
I did lightmapping on the Green hills track, but on the others the result wasn't great, requiring an external lightmapping like Blender.
The game was supposed to run at 60 fps, however I chose to lock it at 45 fps to run well on most computers, I found that different performance affects the speed of the car and the opponents!
Thanks for remembering RETRO CUBE RACING :)