i think you could actually do more than just some circle, maybe even some small lap based racetracks.. or even some first to the finish style tracks..

@physics: ahh they did feel a little scripted, i was running to into cars to see how they react but i guess the suspension and amazing thing you did with the movement fooled me, amazing meaning, how the car skids if you keep turning and lose grip.. good job man, feels flawless..

@replay: am impressed with this the most, simply because i wanted to do my own but dropped the idea after not being able to think up a way to save particles, physics and other player positions.. though i guess there must be a way, will look into it again

@name: something simple indeed:
-boom racer, carBlast, carBump, [too lazy to think up more atm]