Very cool short game! The art direction is very nice and original and the gimmick is a very cool one! Only big gripe is that the indicator below the player implied you could only move three blocks, as apposed to as many as you want. I didn't find out the limitation didn't exist until the "Opsie" level, which was by accident.
I would suggest letting the player know they can move more, either by changing it to a timer that activates when the player first moves a block, or by simply telling them.
Also, maybe include a score system that's determined on how many blocks you move: the less times you move a block, the higher the score. It's way too easy to simply trap the player and turn the stage into a straight line to the end. Implementing this will encourage the player to try to implement strategy into their playstyle and minimize the amount of blocks moved.