To make your own menu: 1. Duplicate the template backdrop inside the project. 2. Change it to look how you want it to look. 3. Remix the project and add a game onto the remix. 4. Give credit to me for the menu.
You can create or use a previously created menu (includes Mario Galaxy, Mario 64, and Mario Sunshine themed menus) for your own Mario game. Credit to Nintendo and Shigeru Miyamoto for creating Mario.