Hex is a board game for two players on a board with 11x11 cells. The red player trys to connect the two red borders with a chain of red cells by coloring empty cells red, while the blue player trys the same with the blue borders.
The game can never end with a draw. The player who moves first has a big advantage. In order to compense this, there is often used the so-called 'swap rule': After the first move, the second player is allowed to swap the sides. In order to apply the swap rule tap again on the cell which was selected in the first move.
Good luck!