Fun, DESTRUCTIBLE ENVIRONMENTS, destroy stuff. Nice. Although, would be better with polish. For example, the beginning menus, the slides and the levels themselves all need more polish and work. And also a few things are missing or could be improved, like the music, and personally the way that the player holds the hammer is also a bit strange. Also, I experienced some performance issues, so it might be better with a loading screen or some optimisation.
Still, absolutely incredible game with a lot of potential. How often do you see a game where you can destroy stuff?