I like the art and animations and also the changing of the level every time you die. The player controller is really smooth and easy to move.
Also, the instructions at the start it's a nice touch.
What I found difficult was the difficulty of the game, maybe to hard to complete the first level? I tried so many times to progress, and I know that when you die you jump higher, but at some point, the frustration was too much to handle forcing you to quit.