I like the options screen with the gauges as the selectors...Maybe you can add another gauge for vehicle selection? I would like to see a different AI system besides the pre-defined paths - maybe use the models in the game as waypoints? Then the cars could race towards the models at slightly different randomly generated angles or offsets (one car would pass X pixels to left other car Y pixels to right)?

Can't wait to view the code...Thanks so much!
-Bruce