Add a domino to an open end of the layout, if you can. If you can't to make a move (or if you need), you must (you can) draw dominoes from the boneyard. When your hand ends you get points: sum of dots from remaining dominoes.
You can draw 10 times (or more) and at any time 1-7 tiles to make up your hand. The first double (1-1, 2-2, ..., 6-6) is known as the spinner.nTo this spinner next tile can be added vertically only and then next in parallel on both sides. nIf there are no dominoes left you can go to the next level and receive 3 bonus draws tiles and 100 points!