In the intro screen you can choose with how many players you want to play (this can be a combination of Computer players and Human Players) by clicking on the Strings. For each of the four players you can choose "Human", "Computer" and "None". The chosen option will be displayed in Orange. Then you can select the number of battle rounds you want to play (Click on "Less(-)" or "More(+)". If you made your decision press Enter to start the fight. In the battle screen you can choose a angle (Cursor keys left, right) and a power (Cursor keys up, down) for your shot. Then press Space Bar and watch your target explode... or not?! After playing all rounds you get a statistic. So have fun!