Hi! My first thought just on a quick scroll through is that adding more contrast to your artwork may help move people through your story. So where you have lines for dark areas, maybe making those dark and even adding grey can help make the comic easier to look at/read. I don't know if you need a mature label for the comic, as it is mostly cartoon violence from what I can tell. But, it is also better to be safe then sorry, I have a page of my comic marked as mature for a hookah, though not for a gun being fired at an object.
What I do like is that rough edges and manga feel of your comic. Reminds me of the ultra over the top violent zines and DIY comics you can pick up at comic fairs, so congrats on capturing that underground, raw feeling in your story telling and art!