Fun game with a cool concept. I like how it makes you think more about where you should place your pieces so your stack is climbable. One suggestion would be to change the font in the help menu, because it is pretty difficult to read when the text is small. I also found an audio bug after sliding a powerup block into an overhang. After that, the sound for moving a piece into a wall played repeatedly for the remainder of the game. other than that, it's a cool game with some potential.