Menu -> Options allow you to link to the platform (Google, Facebook) log in.

Android: Google Play Link

Game data associated with your Google Play account is automatically saved.
You can use the same game data if you use the same Google Play account on other AOS devices.

Please review the following to sign in with your Google Play account.

※ You must have the Google Play Game app installed.
※ Please update your Google Play Game app to the latest version.
※ Google Play accounts only save one game data at a time!