Follow these steps to set up a Game Center account:
  1. Open the Settings menu for your device.
  2. Scroll down the Settings menu to find Game Center menu and tap to open it.
  3. In the Game Center controls, tap to activate Game Center if it is not already.
  4. Create a Game Center account using the pop-up that appears.
Make sure to relaunch the game after signing into your Game Center account.