This idea, killing the fashion designer, makes me laugh! I actually never see the boss because of the way I play. On level 1 I set the box lower than the highest platform, and then jump and shoot. Because of the width of the screen I actually never seen the boss’s face. I find them in your devlog, and surprised that they are designed based on famous fashion designers! Since I have never seen the bosses, the name, Fashion Raider, is a little bit confusing. Maybe it's good if you can show those designers on the menu scene of this game. However, that doesn’t reduce my love for this game. The build and climb action is very interesting. They make this game harder and also more fun to play. I always need to be careful of where to put the boxes and also where to jump.
p.s. this is how I play it. I jump and shoot from here.