This is a very neat concept and I loved playing it, the pixelated reference lines were a wonder to look at. The level design is very good though I would say the last level is pretty hard, still haven't beaten that one yet. I do have one suggestion is that you include in game pointers incase you get lost, I was slightly confused at the beginning. But overall very very good game. (i should've added the game pointers to my game as well :((()