I REALLY love the controls! The movement feels really nice! I wish there were sounds though. I do also like the decision to not allow the player to crash into earth either, making it so you have to go around. Lots of interesting things in this game, like the choice to stop at a repair pad which puts you dangerously far from some of the action, or saving boost for the right times. It might add some more interest to have the repair pads offer limited repair with a delayed restocking so you can't always go to the same pad.
Great game!