Just follow the on-screen instructions to win each Minigame. You are awarded 1 point for winning a regular minigame, and 5 points for completing a Boss minigame. The winner is the player with the most points after a Boss minigame.
Watch out - As a round progresses, you'll have to react faster and faster to win a minigame!
Special Rounds: Sometimes special rounds will happen - Examples include everyone being invisible, or only certain players being required to compete in a particular mini-game.