Just beat it, I liked that I was ALMOST fully upgraded by the last level and not fully upgraded many levels prior. However, because stone and crystal are so hard to get, I didn't feel like trying out many of the other types of soldiers that need stone and crystal.
Oh, it would also be helpful to know if there's penalties for losing. I just lost but I think I only gained resources? I don't know whether to reload or not.
it's kinda gay that the last boss is so much harder and cheaper than the others, and you have to fight him AFTER you waste your time fighting everyone else. And then you just lose because he gets you stuck in his charged lazuh