This game is a mahjong match game. Mahjong match games allow you to connect and remove tiles which: directly touch. touch via a single direct line. touch via a line which has 1 or 2 right angle turns in it. the pictures near the bottom of this article show a couple legal moves. highlighted in white line segments with rounded circles at the ends.
Controls
Desktop Use the mouse left click to tap on two of the same tiles Tiles can only be connected if the lines between them has 2 or fewer corners Touchscreen Tap the screen with your finger and use your finger like a mouse