Where're the Puzzles?
For a game advertised in the description as a "puzzle platformer," there wern't any puzzling levels to speak of. I never had to stop to think about what I was doing. The levels are just straight shots to the end.
Everything else, the level design, the variety of people to infest, and the music is all solid. But it seems like you got the idea for a puzzle game, but then forgot partway through development and made an action game.