Very interesting take on the theme, but the difficulty is a bit too high. Controlling a super fast character that can jump really high is a pretty good challenge, but having killer walls around the whole level feels a little too much IMO.
Also, you respawn really fast and close to the walls, so it's very easy to lose two lives in a row (for example, you're moving to the right and about to hit the wall, so you press left. But you already hit the wall and respawned, so you hit the wall to the left of the spawn).
Still, very original interpretation of the theme.