What I liked:
- Sonic-like loops were really cool
- The art and ui were well designed and were cohesive. Nothing jumped out at me.
- Different car selections is a nice touch
- I initially wasn't sure about the sfx, but once I got into playing, those sounded right to me.
Suggestions:
- I know other commenters have pointed it out already, but the game would benefit from a slightly slower max speed as well as camera zooming out so that you get a better idea of what's ahead of you, especially at those speeds.
Overall, it was a really cool and fun game. Congrats!