I like the gradual difficulty increase in platforms being dropped as time goes on. I think a possible improvement would be to have the platforms that hold the crank that re-raises platforms and father time move around the outside, as I tended hang around the left hand-side in order to prevent a scenario where I couldn't make the jump to the crank platform.
I really enjoyed bouncing off of the time angels head and attempting to land on another time angel - Perhaps consecutive bounces could factor into the score or even give better time bonuses? There was an instance where I jumped on two angels simultaneously and bounced even higher.
Overall, a fun little survival game.