Nice game with some cool methods of moving the player around. My main problem is I don't think there's any benefit to having the mouse control the shooting and aiming. Typically when that is the case it is because you have to be able to move and aim separately, but here you stop moving every time you shoot so I don't really see a point. If anything it just makes it harder to play.
I think it's cool how you shooting slows you down in the air, I think exploring how that mechanic can lead to interesting gameplay would be good.