runs smooth, looks great, and fun to play. only a couple of problems really, one slight and one kind of major. the first problem is with the sound; i wasnt really feeing the music, but you had an off switch for that so it was taken care of. the sound effects could use some work though. the same engine sound all the time got old, you should try adding some enviremental sound effects such as when you bounce off of something or on different terrains. the other problem was that it was just to short. i got through the 10 levels so fast i had to play the game a coule of times for it to seem worth playing. even when i was done with my final go through, i was left wanting more but the levels were no longer amusing. add some more levels and fix up the sound a little and you got one hell of a game.