reorder the boxes until you reach the position with number 1top left and the other numbers to follow from left to right efrom top to bottom leaving the last blankyou can choose either the classic 4 by 4 square (game of the standard 15) orany rectangle with both sides 3 through 10.you can either click or drag to drag the card.it always drags itself into empty space.free and single play for nowmultiplayer mode will be added laterat the end of the game the system tells the number of moves and the time taken.