for now characters moving from backdrop to backdrop is not supported but you can use arrow keys to switch to other backdrops all in a single sprite except for the out of map backdrop
"engine" for map-based adventure games each location has a single background color in this example can go very far out of the map before breaking and messing up locations idea for VBMENJ is from https://scratch.mit.edu/projects/312961473/ and its many backdrops way of doing this simple thing