We can create as many pieces as we want as long as the numbering starts with 0.
The PuzzleDoc has instructions at the top and uses trace to tell the developer that a particular control is missing.
Download the bearPuzzle.
INDEX, Introduction to Using Classes, Preferences: Finding the Class Files, Spinner Class, Using the Spinner Class: Demo, Gravity Bounce, Water Class, Clicker Clown, The Document Class, Create New Movie with the Navigation Class, A Puzzle Document Class, Puzzle Demo, The Bear Puzzle