This was pretty fun to try out. The art really hits that retro style like it would've been on the nintendo 64. I had issues with the camera when I started to up ramps that I couldn't see over, and when flipping over as well. Maybe have a offset position and lock rotation around the x or z axis angled slightly down above the player so that way if you flip over your whole camera won't rotate upside down with the car.
I couldn't test out much of the two player since I had no player two, the map design and environment was fun to run time trials on.