Very clever puzzle game. I'm really impressed by the sheer number of puzzles, and all the twists on this simple format. It took me a few tries to figure out how the clocks worked, but once I got it, it really clicked.
I hit a wall eventually, at the point where there was a clock to my left and I had to cross a chasm with an upward draft at the top of the screen. I just couldn't get beyond that point. :)
Oh, and one more thing--I thought the curved screen effect was quite cool (and subtle enough not to be distracting!).