Lately I have been getting annoyed with me losing my game center over a year ago. I have done everything in my power to retrace it, but it hasn't worked yet. I think you should be able to use Facebook to sign in over devices instead of game center(which frequently signs you out). I have been hoping I wouldn't have to post this, but I'm getting irritated. I just want another way to sign in on different devices. I haven't been up to date with the game due to not having it on me everyday. If you could just add that, that would make my day. -MaxHamster22