Who is "Guest-player"?

If you play on  mobile  device, click "Menu" in the left upper corner, then click “Profile” button. Check out your name in your profile. If there is written "Guest", it means that you are playing as a guest. 

Enter back “Settings” menu and click " Facebook"  icon. It will give you the possibility to play Bingo Superstars with your friends on Facebook on different devices.