At the top right corner You can view Your current balance in coins.
You can use coins to purchase defense cards and profile icons in the game. You can use up to 3 purchased defense cards per game. A unused purchased defense card can be used in another game.
You can also earn coins by the following activities:
- Complete turns
- Complete games
- Recruit friends
- Post Victory screen in Facebook & Instagram
- Invite Facebook players
You can also purchase coins in the shop section in the main screen.