It was done for a competition. It won :)
I have been adding some things to it as I didn't have time to add them before the deadline and always like to complete my original vision. Ramps to jump and gates which open and close for short-cuts have now been added to some tracks. The biggest improvement is with the AI - it now gives you a better race and adapts to your own performance. I've also added 4 more tracks.
Some screenshots ..
Hopefully have a new upload over the weekend. I don't plan on expanding it any further but might do this type of game again in the future.