If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
This is a very simple memory game. All you have to do is just match the pattern shown , on the main board which is in the center, before the pattern vanishes away. Click on any of the transparent ball to change into Batman icon and do not let the Joker to appear on the main board, for it will be the end of the game.
This game is played with the mouse only.