Step 1.) You play the role of a 17th century Caribbean Buccaneer who sails from port to port looking to steal from Spanish treasure ships.
Step 2.) Read the decimal message that appears at the top of the screen. Then, shoot the boat that matches the decimal message (that has the numerical version of the message) with your decimal cannonball by clicking on it. You move from round to round by destroying all of the ships.
Step 3.) After each round you successfully pass, you can obtain a special code that will take you to that round each time you play.