The object of virus is to stop the virus (red squares) from spreading. You can block it by placing tiles according to the rule. If you get stuck, press space to end the game.
Some tips for you: The virus always spreads from the last square it infected if it can. You can use the edges of the board to help box the virus in. The virus can't move diagonally.
Highscore is not available for this game, you can play and submit your score with our