all enemies to about 8 damage per hit. they should just be harder to kill and do more like 1 damage. the way it is now, there is almost no point of upgrading the wall, as you will not even survive one more hit.
would be better if it would let you start from the beggining with all your upgrades after you beat it, because you can only upgrade about half the guys in one campaign.
great game. don't rate down because you haven't realized that you need to take control of a spear guy to defeat trolls. It will help if you upgrade the sword guy, miner, archer, and spear guy all the way, and forget about the giant and the wizard. you should also upgrade the statue's gold. 5/5