A similar type of the game Pyramid except that in this game, you can use as many cards that total 11. The more cards that you use to total 11, the more points you get to score. If you manage to clear the whole card area (without even using all the extra cards, which is a rare event), you get an additional 5000 points.

Left click using the mouse button to loop through your extra card pile. Right click to return them back. This gives you the flexibility of being able to use all your extra cards.