Gold

Gold is the main Currency in Zombie Farm (1 & 2). The 'Gold' (Coin) has the Letter G on it and it stands for Gold. Gold used for;
 * Plants
 * Zombies
 * Decorations
 * Mutations
 * And Other stuff such as Plowing or Farm Upgrades.

Anything that is not purchased with Gold is purchased with the other Currency called Brains. Gold can be earned by either harvesting plants, spun on the wheel or completing an Invasion. Most objects in the game (Such as Zombies) can be sold for 10 Gold.