This is the introduction board, not help board, please mind where you post your threads.
Prnt screen button takes screenshots of your game, and people use it to get up over hills and walls.
as you press that button, you run towards the wall, the game freezes on your screen, but in the game, it actually keeps moving, hence why you can get up over waterfalls.
However...
Just click the feather in the game and then choose go home instead.