Nice concept ! I really like the idea, that's original and can lead to very interesting things !
However, I don't know if it's the rotation speed or if there is an input lag, but like other said, it's really difficult to aim where I wanted. I guess the difficulty is intended, since you wanted a "getting over it"-like, but in "getting over it", the base controls are really simple : it's the level design that makes the challenge (and frustration). When you fall in GOI, it's your fault, as a player, and that's where the beauty is. Here, since the base controls are so difficult, the frustration is towards the game itself : it's not my fault, because I didn't want to do that anyway.
As you said in your description, you didn't have time to polish your game, and yeah, it lacks a bit of refinement. But overall, I really like the idea, and I would love to play a more polished post-jam release, with easier base controls but more sadistic level design =p !