for the level close to the end of the game, 18 or 19, where there is a just a green bar over a chasm, i built a clone tower, and had the others jump off to get to the other side. Took over 15 clones, there's probably an easier way...
here's a tip, when you get zombie MJ, if you haven't used him in the city your in already, use him when you destroy the town to collect all the money. If you already knew that, good for you.
When I saw the first screen after you choose a camp, I immediatly began to regret playing the game. Reminds me of Evony Age II, which was awesome compared to this.