Wow, this is amazing!
The execution of the art, sound effects, and design is outstanding!
I especially love how the game forces you to move fast, while also forcing you to stay close to the ground to recharge your sand meter. I applies the perfect amount of adrenaline required for a fast moving game!
I think the only suggestion I have, is to add mouse controls for aiming your sand blaster, since it was quite tricky to get used to (given the high gravitational pull).
But honestly, awesome game!