Memorize the sequence the outlaws appear at the building windows (do not consider the innocents) and repeat the sequence in the exact order. If you fail the sequence you lose a life. If you repeat the sequence without errors (in a single level) you win a life and a bonus of 5000 pts.
Use the aim to shoot at the windows in the correct order. Use +/- to enable disable sound. Use ESC to quit to the main menu.