Brutal indeed! Probably could use 1-2 even simpler introduction levels in the beginning, to familiarize with the controls. Any maybe even an "easy mode", where you respawn at your last position rather than restart the level. Even though that can become tricky with moving obstacles involved... Presentation is minimal, but spot on! Really like the sound and particle effect of the death animation and the gradient on the tail the ball is dragging behind it. Further plus: immediate restarts, both with "R" and "space".