I first found this about two months ago, and I can now say with confidence, wow, I really should've given this a try earlier.
The art is really something else.
It looks unique, and contains plenty of memorable pannels.
It uses color wonderfully to convery feelings or concepts, like the swords (destruction) being pitch black, anger and mosquitos using this violent red, Kisses' being calm blue, the never ending whites nothingness used for isolation and loneliness, the change from the constant use of color everywhere to it's minimalist use after Kisses loses those dear to her and her world "loses color" in a way, it just all works so well to help better convey emotions, enhance the story, set the tone.
It's use of scale is simply incomparable. I am someone who generally dislikes the use of two page pannels (and lenghty pannels in the case of Manwha/Manhua), but here, we see huge pannels being properly used to convey destruction, despair, and overwhelming odds, in a way that truely be impossible with normally-sized pannels.
Even text is used creatively. When someone speaks over someone else, you'll see them literally overtake their speach bubble, when the author wants to give words more punch, he doesn't hesitate to just give them space without anything else present to serve as a distraction from them, the text and art aren't used as two distinct parts of this Manhwa, but together, allowing both of them to do so much more.
The art looks rough, and the designs aren't all that great honestly, but it's very clear that the author/artist carefully considered every aspect of this piece's visuals, offering truely outstanding results.

The story is also top tier. It flows seemlessy from one point to the next, going from a serious story about desparing and hope as the last remenants of humanity fight for their continued survival, to a comedy and character-centric story, to then become about determination and beating the odds, to swap back to hopelessness, before telling you of companionship, power and fear, to finally end on a promise of a better future, and it does all this without you ever noticing it, in a way that feels like one continuous thread.
Everything is also to the point, there's absolutely no filler and everything is as condensed as it can be, without ever feeling rushed or forced. We are introduced to 7 characters in the first chapters, and with only a few lines of text, all of them are able to be clearly defined and completely fleshed-out, instead of trying to poetically go on and on endlessly about how humans have been waging war and killing eachother since the dawn of time, using their intelligence only to develop only more sophisticated ways to end each other, it just shows you what it means without a single word, and it still manages to get it's point acress perfectly. Mosquito War doesn't repeat itself, or feel the need to explicitely spell everything out as if you were a 5 year old, it just tells you its story in its own unique way and it feels refreshing.
I love the story. If we take all of the small parts I talked about in the first part of the story section individually, they are all great, I loved the way it sets up its world and tone, I adored the over the top humor and self-aware jokes of the comedy part, I was captivated by the more serious drama parts, and I couldn't take my eyes off my screen for its ending, leaving me feeling similar to what I felt before Dreamcide's epilogue, it felt like something that you could just have stappled a white screen with the words "The End" on, while still being satisfying, it was simply perfect. The story as a whole is similarly unique and enjoyable, everything from its world, to its characters, and events just felt right.

Low 9. I shouldn't have waited so long to start reading this.