The idea of cellular automaton is great for this theme. However, the game is quite difficult. I think this is mainly due to poor introduction of mechanics. I found level 8 and 13 to be pretty difficult, but I managed. While level 11 and 15 were too difficult. The other levels were all right. Though, this really depends on seeing the solution or not. I also had a very strange solution for level 16, but it worked. There is also a bug with the generator block, it can duplicate the boundary wall, which I don't think was intended. Though, it could make for an interesting puzzle.