New Super Mario Bros. Wii Coin World is an arcade game based on the Nintendo Wii game of the same name. However, it is primarily based on a slot machine mechanic. The goal is to collect five keys. These can be collected both on the slot machine or through events. The events are minigames directly based on the gameplay of New Super Mario Bros. Wii, but in the form of smaller minigames. After the player gets all five keys, an event with Bowser starts. Winning results in a jackpot. (mobygames.com)