Back on the main stage, create the base for your instrument of squishy destruction. Just draw a slingshot however youd like, though make sure to give it an extra long handle, as later when the game actually works your players will be sliding it up and down and you dont want the bottom of it to show. Detail it however you wish, including the wrapped thongs of the slingbut dont add the actual sling itself. Make the base into a graphic symbol.