Nice art man!
Just a tip, try including some score in order to give the player a wish to play again! Besides that, it's pretty amazing!
Great, thanks! I'm not so keen on scores, level-ups and collecting coins on question mark boxes myself, but I get your point. I personally thought making the doppelganger fade a bit more every time he reappears would give a hint that something is advancing in some direction. Maybe it would even bring up the question what would happen if the doppelganger fades away entirely? :-) But so far most feedback we got was that people didn't even get to see the doppeganger once because the level is too hard. We are aiming to fix that.