Good, but problem of your game is it's short (I've spend less than a minute to complete). I think you better make big game with many levels and checkpoints where you can stop simulation for undo (like game save) maybe some upgrades to car and so on...
Agree with Killinich. Its a fantastic concept, the car/glider is pretty good handling. Its just the levels should be about 10 times as long. You're good at designing them though.