This is a very nicely done game! I appreciate the art style, especially. I love the way one level transitions into the next, and the background is a nice, fitting animation.
Design [4/5]: This is a nicely designed game. The mechanics are simple to understand, but difficult to master. I also like that the game throws you into the experience without a patronizing tutorial. It trusts players to be smart enough to figure out what the goal is and to figure out that you need to get rid of all the clones to finish the level. I love that there are two phases to some levels: the first phase is getting yourself to the exit, and the second is getting rid of all the clones without losing your footing or killing yourself. It's really cool, and it forces you to plan ahead before just mindlessly moving around.
I would have loved to give this five stars instead of four, but I think there's one thing holding the design back in this game: the sections that require precise platforming. First of all, the platforming controls are not very precise. This isn't a problem in and of itself, but the level design often requires very strict and precise movement. In particular, the fourth and sixth levels had some really frustrating, narrow hallways with spikes. On those levels, I had figured out exactly how to solve the puzzle, but then I was frustrated because I couldn't execute my plan due to how close together everything was.
Adherence to the Theme [5/5]: All levels take place on a single screen and all clones are controlled by a single input. Nice!
Originality [3/5]: I can't give full credit for originality because I've seen this concept done before in another game I've played: The Swapper. The difference is that, in The Swapper, you can create up to three clones and you don't need to destroy all the clones to finish a level. I think those differences are enough to make this game unique, but the idea of controlling multiple clones with one controller is something I've seen before.