I agree demonata, I think some kind of battle system with skills (i.e. like in dream world) instead of just 'attack' would be good. Raids dont really need to be changed.
The problem with the energy is that its just a money grab, if you dont pay, you cant play basically. It tries to get you to think you could play without paying but it takes an hour to battle your way through a single quest without paying.
Can someone explain why after an apocalypse, a guy who clearly can come back to life, is trying to drive a vehicle, apperently bought from a zombie shopkeeper, towards a helicopter. And every time he dies he gets paid by the zombies to congratulate him so he can spend it at their zombie car shop, which happens to sell guns with which hes killing them?
the level minecraft defense killed me because it made me only upgrade the mine guns until my cannon did almost no damage whatsoever. Needs to let you upgrade whatever you want.