This is really nice! Good art, boppin' music, and I especially like the sfx. The sound of the engine revving up and down as your speed changes is an excellent touch! Restarting is also seamless and makes it easy to just keep playing for ages. I was able to win after about 10 minutes of crashing hopelessly into the walls :D
If I could add one thing, maybe more visual feedback when you save everyone. The sound effect was nice, but if someone has sound off they might not realize the game acknowledged that they won.