At first I didn't understand why you had to use the z/x key to rotate the player, I had a hard time getting used to it and thought I would rather use the mouse. But after I collected more elements, I understood and got used to it. I had alot of fun playing this!
I did notice a bug though, the enemies would sometimes get stuck on the walls (which made the game easier for me). But during the boss battle, they would also get stuck between the elements on the player, leaving me unable to kill them or even move at times.
Overall, its a good game I really enjoyed!