Neat, I think this is the first time i've seen rewind be the enemies weapon instead of a players tool!
Unfortunately level 2 seems to have some poor design as it's nearly impossible to get through... If the devs were the play testers, just remember that the developers of the game always make the worst testers as they know everything about the game and how to play. When they feel it's too easy, they ramp the difficulty and play test some more, leading to a difficulty creep.
It was a neat concept though! The blocks you stand on have great applications and balance pretty well with the rewind