Some criticism: if you're going to do something like this, I suggest you really try to nail the collision system before making anything else. There were times where I was standing next to a stack of two of me, both flush against a wall, and I still couldn't jump. I also found it hard to control the order in which my clones unstack. I really wanted to like the game - it's very cute, but the unpredictable collisions kind of ruined it for me :(