You had me until level 7, where you have to flip the camera while in midair. Just not quite enough co-ordination to pull that off without plummeting to my doom.
That's a little much to expect from your player, I think. Especially since it can be hard to remember in a pinch if it's A or D that turns the correct direction.
But then you won me back in level 8 and 9. I liked the puzzles where you have to turn the camera to hop on the ceiling of something you couldn't in 2D.
Then I got a game over in level 9 between two laser with no ground between them. That was rough.
And, man, restarting from a game over only gives you one life? I don't think I can ever win the game in that case. Still, I had fun while it lasted.