Four In A Line description

Four in a Line is good old classic game for two, but let us repeat few rules:
When each player is on the move he or she drops a disc from the top in one of seven columns on the board.
The object of the game is to connect four discs of the same color vertically, horizontaly or diagonally.
When you connect four pieces you win.
If nobody connects four discs then it is a draw.

How to Play?
Drop the piece touching the screen on selected column.

Buttons:
Continue - Play next game
Back - Undo your last move
Cancel - Exit the current game