I like the concept of a magical girl building an army of her own clones, only to have them rebel against her!
As a game, it's pretty simple and straightforward. That said, I could imagine this working as a mobile app game. It reminds of the "HeroWars" ads I always seem to get, and in the comments there's always people wishing the game was like what the ad showed. I think with a little more development this could work well, and fill a demand for that audience! As it is now, it's a solid prototype.