It's very sad that this game was hacked and multiplayer was removed. I wish I could have seen it. The truth is that we really aren't going to get back multiplayer. Hope that Ben's new game will be more secure and have multiplayer.
This game is hard. Many people including me have complained about how hard it is, but 13 EASY levels would make for a truly boring game. This game is possible to beat if you use your head.
A tip for Galiant the Paladin or whatever he's called: First note, THIS FIGHT TAKES A WHILE. Because he can recharge up to full health. This may annoy you, but just keep healing your team with 'Heroic Motivation'. Just do this until the Paladin is out of focus, then attack. Fast.
I really love watching the levels play themselves out. It's just like seeing something you've built all by yourself working. It's very hard to explain.