That is such a good game you got there, DAb! I really like the way you did it. Good FPS rates (~20 on this computer), but there are a few things that pull the rating down 2 stars:
* Weird sound effect when racing at max speed.
* I didn't see any head-on collision detection? (I have tried.)
* Where is the preloader? If you have a modem connection (56kB/s), then you would have to wait forever for it to load.
Anyway, good one ! :)