These puzzles are quite hard! I got stumped by the first level that has both static and following skulls.
It's an action/timing puzzle game, which keeps things interesting but yeah I think the difficulty was a bit too much for me. Particularly those skulls that follow you!
The art style really fits the difficulty however! :D
One suggestion I would have is to make the movement controls match what happens on screen when changing gravity. You already did when the gravity is up, but I would also change the controls to make it so that you use UP or DOWN to move when the gravity is on oriented towards either side.