Love this game. So additive. Can't put it down. The levels can be challenging but that's the fun of it. If it was too easy we would all complete it in a day. Thanks for the extras like side bonuses on the weekly events as they help out a lot. I understand people's frustration with using 10 energy a time and not getting that good of a return but its all part of the game. I'm on level 1320 and still loving playing it. Thank you