Fantastic start to a racing game, which is not easy to do in a few days.
If you aren't going to simulate a Scalextric car on tracks, then really help a lot if the players can see the wheels steer to give you feedback. Also, at the moment, the steering is very hard, and I think this is because the car slows very dramatically as soon as you release the W key. Would be easier to get into the game and control your cornering speed if the car slowed less and needed to press S slow quickly (ie brake).
For the time you had this is really great work!