Short amount of gameplay.
Only three levels.
Okay, the reason why I gave this game a low score is simply that despite the great gameplay, the game is so short that you could finish all three levels in under an hour. Unlocking everything will take awhile, but this is basically a game that you can finish during the weekend.
This game is good because you get points for destroying things. The unreal physics make for a few good laughs (especially, when you crash an RC car into a bus and the bus gets totaled).
A good game, but get Runabout 2 or Super Runabout: San Francisco Editon.