Cool mechanics ! The game is a bit short (which is a compliment, because I wanted to play more of it) :)
I agree with daid for the health. it seems a bit uncessary since you have the time rewind. I would have loved to see it used/needed in the platforming (maybe some kind of traps that block the way and you need to rewind it to get the right timing or something ?)
Appart from that really solid entry. good job :)