I think that environmental damage is a cool concept in general, but personally I loved weaving between the enemies and getting straight shots because my focus (sightline wise) is on the enemies shooting at me, not the barrels that aren't threatening me. A boss fight would be great as long as it encourages repeated movement around the field as opposed to shooting while still. Also, I'm down for having a low number of bullets, but maybe not less than the number of enemies on the field -- that might just be me though. I didn't notice that the enemies were female or that there were female enemies -- if you want to differentiate enemies, I would suggest making the design more distinct to signify that I should expect to encounter different behaviors. Hope this helps! Would love for you and your team to check out my game too to give feedback!