I am making a shoot em up game with an aerial view. It’s main gimmick is that, instead of working like a machine-gun, your character throws a boomerang that hit the enemies both on the way there and back. Aside from completing the level, the main goal is to get the highest score. You get score for each enemy defeated and get a bonus for killing multiple targets in a single shoot, encouraging you to make fewer attacks. Now the problem are the bosses. Almost all of them will be single enemies...