This looks exciting. And I love kart racing games.

Some advice from a kart racing fan:

- Music needs to get the player in a 'fast' frame of mind.
- Players need to feel that they are going fast or they'll get bored.
- Variety makes these games fun and there has to be something 'different' to set it apart from the others.
- Multi-player is a must!!! ...or people will lose interest fast. Game Center and Open Feint would both be of help here.