Instead of goals. We have a scoring bullseye scoring system. where just hitting the back wall gets you points. Closer to the center the bigger points you get. The game doesn't stop with each score. Keeps action going and it prevents the demoralizing shutout scores. To promote precise shooting. You can have the bullseye rotate. You can make this system work even with parts of the side walls being a scoring opportunity. Perhaps the ceiling is negative points? this way you have an ever-evolving scoring frenzy.