You can add friends to play with here: Friends menu → the Invite Friends tab. You can use the following ways:
1. Add friends in the game using the game identifier (Support ID) that players post at the official game community on Facebook here: https://www.facebook.com/355886191166202
To redeem a code, press the Add Friends by ID button, enter the code in the field in the apearing window and tap on Add. A number of invitations you can send is unlimited. You can also find your ID in the pop-up window and share it with your friends.
2. Add friends from Game Center.
3. Add friends from Facebook: mark the friends with a tick and press Invite.
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