To start a round, someone rolls the two dice — one showing a color, the other a creature — then everyone rushes to "grab" the appropriately colored creature tile by slapping it with their tentacle. The round doesn't end until someone removes the tile from their tentacle and holds it in their hand. This player scores a point, then you do it all again.
As you collect "Deep Ones" point tokens, you'll suffer curses that will force you to wield your tentacle in unusual ways. Whoever first scores the predetermined number of points wins!