The goal of Hextris is to stop blocks from leaving the inside of the outer gray hexagon.
Clear blocks and earn points by making 3 or more blocks of the same color touch
For desktop users, press the left and right arrow keys to rotate the hexagon
For mobile users, simply touch the sides of the hexagon to rotate it.
For users who might experience blank sections within the hexagon while playing the game, simply zoom in the display of your browser to about 90%. This should fix it. Remember to revert your browser display settings when you are through