Hell yeah, this was fun. Classic arcade racer vibe, like it :)
Pretty well polished, decent AI opponents, and really like the flow. Also get pretty electric when other racers start joining.
One thing that caught me was that the 'engine' audio is panned pretty heavily to the right. Think it would sound great if it was dead centre, really place you 'in' the car.
Great work, this is a solid submission!