Please add background music. This goes a long way in telling the players what kind of game it is and what kind of experience they might have playing it.
I was confused sometimes because there were not many animations or sound effects to tell me what was happening. Especially on the first and last levels where you have to stand on the objective.
Overall it was a fun game that I did finish all the way through because I like puzzle platformers, and you definitely got that part right.