I appreciate the effort that went into making this game and it was exactly what I was looking for. As others said, the difficulty doesn’t really increase beyond the first few things you need to learn... merge your own people, sacrifice low order people to clear devastating bombs, and attack in the right order. Never more than a couple floors, never a situation where you are forced to sacrifice players at the cost of making the adversary stronger, only a few times where the order isn’t obvious. So much more could be done to increase the difficulty. Between this and candy crush that gets impossible without power ups, I’ll take this. But yeah, looking forward to an upgrade. ;-)