Imagine that you want to play billiards and are already set up to play, but the table is not prepared. On the cloth should lie balls formed into a neat triangle, but this is not visible. Turns out. All the balls are mixed up and put into large glass bottles. You will have to sort the billiard balls by color. The bottle should contain only balls of the same color. To do this, move them using additional empty bottles as auxiliary ones. The game has several options and in particular: mixing, as well as adding capacity. Periodically, levels will appear in which only the top balls are visible, and the rest open as the visible ball moves in the Pool Ball Sort.