This is a template where the character can travel between screens! If you move Scratch to an edge, he will jump to the next part of the map. He starts in the center of a 3x3 grid (which can be easily expanded or shrunk) and can travel to any one of the nine areas. Maybe create a maze-puzzle? Such as getting a key from one screen to use on another?
This is accomplished by using a SceneX and SceneY variable, just like a coordinate grid. When Scratch reaches a coordinate threshhold for the edge of the screen, it will add/subtract to the SceneX/Y accordingly (for example, moving up increases SceneY by 1.) Then, the correct backdrop is chosen.