Thanks for the feedback!
I considered that as an option during development, but since I felt the theme wasn't really that present in the game I decided to also "join together" the hitboxes. That gave me more headache than it was worth and I thought about subtracting ammo rather than health when the enemy got hit, which I think would be way more fun, but it was already very late into the time limit and a lot of stuff needed work.
I'm happy you gave it a try and had some fun!