Really fun game. Super tough (the controls were a part of it, but please don't change it. It was the appeal for me)
The audio is great and chill, really fitting.
Well designed. Good job!
Edit: I saw you were going for an undo button. I must say that it will make the hard controls nothing but a nuisance. Right now it's a mechanic. With an undo button it's "Damn I missclicked again.. undo"
A more clear rear and front will help it feel better tho.