At first I was confused and a bit frustrated with controls and lack of in game instruction (didn't read the game page first), but after moving around and figuring out that space was a hover and not a dash, then unlocking the rock thrower and figuring out the other mechanics.. I realized it really was a great start and had some potential.
The only real suggestion I have is have an in game menu/prompt of some sort that instructs on the different inputs. It was easy enough for me to figure out, but it was a frustration that wasn't really needed.