The player with the highest double goes first. To place a domino just click on it. If a domino can possibly go on either end of the chain, you make this by clicking on either the left or right hand side of the domino. If the left side of the domino is clicked it gets added to the left side of the chain. If the right side of the domino is clicked it gets added to the right side of the chain. If you cannot make a move all the pieces will turn red. Click on the deck to draw a new piece.