I loved the art! The little construction dude was my favorite.
This felt almost like a physics puzzle to get all of the objects pushed into the right places from the right angle. It was a neat experience! Giving the objects circle colliders made it possible to push them away from being against walls, but you might be able to give them square colliders if you gave the player some kind of drag ability. (I also really liked all the carefully done backgrounds by the way)