Hotshot Racing - I play this from time to time. An arcade racer, good for a few laps here and there.

Strangely - I unlocked a track once that never appeared again. Not sure how I did it, but booted the game up one morning and there was a track I'd never seen in there, and then...it was gone the next time I booted it up. Must have unlocked something by accident with a glitch and then...it never unlocked again.