An attention-seeking mass shooter that doesn't actually want to kill anyone is a bold and innovative game idea.
However, the game wasn't very fun. All I had to do for 3 stars was unload my gun point blank into an adjacent wall while people were crowded around me. Standing in 1 spot and doing the same thing repeatedly and thoughtlessly to win is not fun. Players need to be forced to change up what they are doing.
It would make the game more exciting if the enemies could knock you down or defeat you if they run into you, but could also knock each other down by colliding. Maybe if you shoot close enough to an enemy, you can cause them to run the direction you want, and steer them toward colliding with each other for points.