From the developer:
"The game starts with 10 x 12 field full of figures of different shapes and colors. Your goal is to remove them. If you see areas of two or more figures of same kind residing next to each other (on X or Y axis) you can remove them by taping anywhere in the block. There is no limitation of the number of figures that will be removed with a single tap, but you can not remove a single figure. When an area gets removed, the above figures fall down and fill the gap where it has been. When a whole column gets removed the columns next to it shift to the left. If you can predict how each move affects the progress of the game you may win."