Each board has 9 tiles on it. You must select 3 tiles which either have all their traits the same or different. For example, all squares, but with 3 different background and primary colors. Or a red circle, yellow triangle, blue rectangle, all on the same background. Once 3 are selected, click the "Match" button.

Click or tap each tile to select/deselect them, or press buttons.

Match checks your selected tiles for a success and Shuffle resets the board.