First, I LOVE the thumbnail. It's beautiful. Also, I enjoy the simple, transparent design - you just race your Chevy around a loop, and that's all you need to know. The music is really good too! I like a little bit-crushed beat to spice up my day.
The driving model is a little confusing, because it seems like the car is rotating around a point in space slightly behind it, and there's no drag/friction against the ground. Could use some tweaking.