First, the player must bet at most 99 coins. The Koopa Troopa in the Warp Pipe in the middle then hides as the three pipes swap around. After the pipes stop shifting, the player has to pick one. If the player picks the pipe that contains the Koopa Troopa, the player gets double the number of coins they bet. The player can either double the coins by pressing or keep the coins by pressing . If the player chooses to double the number of coins once more, the pipes swap a little faster. The player can bet up to five times in a row. If the player picks the incorrect pipe, they lose all the coins they earned from betting.