Select Free Play mode and the Master difficulty setting. Set the "Music selection" option to "Playlist". Select "Create New Playlist". Add more than thirty minutes of music. You can check the total length of your playlist by looking at the top-right corner. If desired, select the same song multiple times. Select "Back" and save the new playlist under any name. Choose the newly created playlist start it. Complete all the songs in your playlist without leaving Free Play mode. You pause the game if desired. You do not have to beat songs during your first attempt. Dying and repeating a song without restarting the entire playlist is allowed.