Track down and destroy enemies one at a time. Enemies usually appear
offscreen. When enemies shoot at you, a brief countdown will be displayed on the
screen, along with a warning sound. You can deflect bullets by pressing the
defend button, but this uses up some of your ammunition. Shoot boxes to
discover bullets and bonus items. Rescue hostages for bonus points. If you reach
the final stage, you'll get a chance to take out the crime boss with a single
shot.