All the levels can be accessed via a map screen, and enemies are often roaming it. If the player bumps into one while traveling the map, a "mini-boss" fight will be initiated; if successful in the fight, players can earn three extra Super Mushrooms. There are also Toad Houses where players can earn additional lives and items that can be equipped on the map screen. At some points, a Toad will appear trapped in one of the previously completed levels, and the player can choose to rescue him from a block and carry him safely to the end of the stage to earn bonus lives (this can only be done with one player). There are three Star Coins hidden in each course which can be spent on hint movies that show certain secrets, such as the location of a secret goal or how to gain infinite 1-ups. Collecting all the Star Coins within a world unlocks one course from the secret World 9 that can only be played after the main game has been completed.