Like other in the comments, I wasn't able to finish even the first level. As I can see you developed on Unity, I think with a few tweaks with RigidBody (gravity and forces) you can achieve something way more interesting.
Also, when you change control it is frustrating to press again spacebar. What I mean by that is, it will be better and less frustrating to hold spacebar and change command based on your inputs. Neat concept and don't remember to test with care your game, even if you are not good with testing, ask your friends to do it or just play it for a few minutes.