S h o o t t o m o v e.
Gosh I suck at this game. I'm not that into hardcore platformers but I enjoyed the game quite a bit anyways.
Having my clone damage the character definitely kept me on my toes the entire time (sometimes a bit too much honestly). Not sure about puzzles though - I skipped quite a few of them but if these were mandatory I don't think clone damage would give me time to think about the solution.
The graphics and music/sounds are awesome though, I loved it.
Overall, amazing job!