This is more like a My Little Army with an Epic War touch in it. The hero is much to valuable to actually use in combat, thus rendering him useless. Keep the art, I like it. Keep the building making units, its good. But just make everything a bot more like epic war. I wanna defend my castle. not my hero.
I think you should have it that if your hero has died, you ARENT defeated. Make some other way to be defeated please, Having the Hero die isnt that good
I thin k we should be able to see battle-scenes and have a better "dice" system. Most of the time when you are conquering you lose, even a 30 verses a 1 (its happened to me)