Order

  
      The goal is to order consecutive numbers, starting with 0, 
 
      from left to right and from top to bottom, with a low score.

      When a number tile is ordered, mark the tile (tap or click). 

      You may demark a marked tile, but the score increases. 
     
      With each move (swipe or arrow key), a new number tile 

      appears in a random cell and the score increases. 

      When a tile bumps into its neighbor, the tile disappears, 

      while the neighbor's number increases (UP & RIGHT) 

      or decreases (DOWN & LEFT). 

      Mark the last cell to see your score, the lower the better.

Uses the boarding package.

Play the game.