• Start the game by either pressing 'Shuffle' or 'Default.'
• Click the number you would like to move.  Then click the adjacent space you would like to move it to.  The numbers will switch. 
• Numbers can't be moved diagonally.
• Arrange the numbers so that the total of each column, each row and each diagonal  is equal to 15.
• There are 8 possible ways to arrange the numbers.  Have fun discovering...!