The controls already work pretty fine for me, but I'd like to have even more air control to jump more accurately from platform to platform.
What I missed most was player guidance or some kind of hint where to go. The first concept I suggest is adding coins or some other collectible to show the player a good route. The open world concept might soon be too confusing as the player loses orientation. If you do not want collectibles, maybe add some kind of navigational system: a simple arrow pointing at the goal, a twisted energy stream connection from the player to the goal or even some acoustic guidance so the player can hear, where the exit is.