I would rate it zero for current bug in the game. As it doesn't allows users to login into their old account. We play we enjoy we spend time to get the account to different levels. But something happened to your phone and your account is gone. And this game asks us to start all over again. Support says they are unable to retrieve your account. You need to log out from old device but hey i can't something happened to my device and i got a new one... No simple understanding. Need to fix the login.