Donut Secret House

Donut Secret House is a secret level of the game Super Mario World. This level is the home of the Big Blue Boo, the miniboss who protects the Star Road. If the Mario Bros. beat this boss, they'll have access to go to the Star World.

To defeat the Big Blue Boo, the player must pick up the grab blocks that make up the floor and kick them at the Big Blue Boo, without taking the floor away in the process. After the defeat of the Big Blue Boo, the player can access the first Star Road, which leads to Star World 1.