Drop discs into a channel to try and form a straight line (in any direction) of four discs of the same color.
As you move the mouse across the top an animated triangle will indicate the column your disc will drop into. Click the mouse to drop the disc.
The animated triangle will automatically move across the top of the channels. Click the mouse to drop the disc.
NOTE: If you choose "Mouse Click Only (Scanning)" then a large green button will be displayed below the Game Menu and below the Game. Your mouse cursor must be positioned over the large green button while scanning for the mouse/switch clicks to be detected.
Press the cursor (direction) keys to move the animated triangle across the top of the channels then press the SPACEBAR or ENTER/RETURN key to make your selection.