This game is fun exciting an interesting until you start leveling up then foes get very hard 20 levels higher than any units that the players have unless you're in a position to send loads of money on in app purchases in order to be able to beat other players and the challenges not to mention the adds a thrown in your face regularly, I'd say this game is money grubbing, the new update is new units that you purchase, from what I can tell the update is nothing more things to sell, disappointed...