Denver Zoological Foundation

Click on a piece of the puzzle to select it, then click on another piece of the puzzle to swap the pieces.
Click on the current level button (indicated by green light) to scramble the puzzle at the current difficulty level.
Click on the level buttons (Easiest, Fair, Hard and Tough) to change to a new level and scamble the current puzzle.
Click on the New Puzzle button to randomly select a new puzzle and scramble the image at the current level.
Click on the Unscramble button to see the current image as it should appear. Click on the current level button to rescramble the current image.
Click on the Show/Hide Hints button to show or hide a key map indicating which pieces are in the correct places (green) and which pieces are in the wrong places (red).
Click on the Show Help/Puzzle button to toggle between the puzzle image and the instructions.