The object of the game is to place 4 of your pieces in a row, horizonally, vertically or diagonally. When it is your turn, point to the column in which you wish to place your piece and click the left mouse button. The disk will drop into the column, going to the bottom or until it comes to rest on top of the stack of disks already in that column. When 6 pieces have been placed in a column it is full and no more pieces may be played in it.