Goal of the game is to be the first to reach 4 positions in a line. A line can be horizontal, vertical or diagonal.
You play against your computer. You start with yellow and your opponent follows with red. You place by clicking the desired position. The columns have to be filled from down to top, thus you can only click on a bottom position or a position above an already occupied field.
After setteling your position it's the PC's turn. This is indicated in the top of the window and a red button becomes visibel within the window. By clicking this red button the PC moves and it's again your turn ....
Enjoy the game !!!