The players are standing on a bridge as the river flows beneath them, with the platforms on it. The bridge then falls, and the players fall onto the beginning platform.
The object of the game is to jump onto the many different rafts to avoid falling. If a player falls in the water or touches an enemy, they are eliminated. Players who can make it to the last raft, being pulled by a Koopa Troopa in an aquatic vehicle, are declared winners. The last raft will appear early if only one player remains. If all the players get eliminated, the minigame ends in a tie.
The final platform comes to a stop at the top of the waterfall, with the winning players' animations playing as the Koopa drives away.
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