Stars: Experience points earned as you continue throughout each quest area. The more you earn, the quicker you’ll be able to level up and raise your stats.
Coins: Purchase reshuffles for battles and more with coins. Earn coins while completing quests and defeating opponents as you progress.
Smiles: These are directly correlated with your friends and the actions that they take. Receive more when friends send you cheers. You can send cheers to friends as well.
Energy: Energy is required to participate in quests. Once depleted, you can purchase more with brains or wait for them to repopulate.
Stamina: Denoted by the red sword, stamina is used in battle. You can purchase more by spending brains.
Brains: Brains are the premium currency of Zombie Farm Battles. They can be used to purchase energy, stamina, and more. Additional brains are purchased with real-world currency. You can also earn them when you complete quests.