Very well made platformer with a cool inversion of the typical speedrunning mechanic. Graphics are simple yet effective, responsive and communicates information to the player very well. Sound effects complement the gameplay and graphics very nicely and are pleasant to listen to. The same can be said for the music. However, I did encounter a weird visual glitch where on level 6, the spikes of the first room were invisible until the yellow square was picked up.
Very well done!