I wrote a tutorial for students where they build a multi-stage game app: CS 107: thunkable - Unit 3 Lesson 3: Maze!
I see there is a block under Canvas → Move that indicates that you can move a sprite to a different stage:
I tried to utilize this block to move a ball sprite to another stage, but I was unsuccessful.
There isnt documentation for this block in the thunkable guide.
Here is the project I am working with: Thunkable
Any suggestions for moving sprites between stages is much appreciated!