Cool looping mechanic and nice simplistic graphics. Maybe you could make the physics less bouncy and remove collision from the hat to make falling smoother. Also the levels feel kind of repetitive so you could make it longer and add more changing obstacles.
Great game! Maybe you could add some more effects and different effects. It doesn't really feel like the game loops. Maybe make it so that the level stays more similar.
Other than that. You had nice mechanics and good levels.
The ball goes a little too fast to really control and I don't think the 30 s timer resets between levels since I was having big trouble beating level 2.