It was cool.
There are some problems, like how on Level One there are the two walls in the middle of the screen, if you are touching them you dont crash but if you run into them you crash.
Also, if you're standing still, the people can pass right under you. You should make them be able to at LEAST bounce off you (or add an easy mode in the game which means they die if that happens when playing in easy mode).
Get rid of the time limit, it's more fun without one. After all, would you want to be timed if you were driving around a parking lot, running over innocent pedestrians? I thought not.
And like the previous person said, ADD MUSIC. NOW.