The game is played by 2-4 players on the board consisting of 24 hexes. Players start the game creating little ColorMonsters made of 3 segments, each segment having one mouth. Each round, the stones (meteorites) are placed on the board. From them, ColorMonsters harvest gems (and Action cards)—as many as the number of their mouths face the stone. Players trade gems with each other and sell them to the bank for Galaxy money, using them to buy Gold, and Action Cards from the bank. Each round, the ColorMonster can grow up one two-mouth segment, up to 7 segments. ColorMonsters can move on the board to make more gems and hinder other ColorMonsters in making gems. To win the player(s) needs to collect 7 Golds.