You start the game with 100 coins. You must breed all of the monsters until you get a wubbox. By breeding two of the first monsters together, they create a secondary monster. In order to acquire the wubbox, you must have 1 million coins. The secondary monster make 1000 coins per turn, the tertiary make 50000 coins per turn, and the Entbrat make 150,000 coins per turn. To buy or breed a monster, you must have the appropriate amount of money. If not, tell the user they don't have enough money.