Rules: In this game, you play against the computer. You start with inserting a coin (you have the red ones) into one of the columns. The coins will always fall down to the bottom-most free place in the column. Then the computer inserts a coin (a blue one), afterward it's your turn again, etc. Both players have to place at least four coins of their own color in a row (horizontally, vertically or diagonal) to win.
At the moment the computer intelligence is very low, so it's easy to win.