I've searched up and down this forum to find the answer but no luck. And I've tried everything and it's still stuck on the main screen with tanks. My network is T-Mobile wifi model number is ME323LL/A and version is iOS 8.3. I've done the reinstall it. The log out and in of App Store. Log out and in of Game Center. And rebooting it. But none of it works. Any help is appreciated.