As someone who doesn't consume zombie media, the visual novel lays out an intriguing (and a bit depressingly plausible) scenario on how the world would handle a zombie outbreak, and that while it's highly unlikely some people with rabies are going to cause the end of humanity, it sure would suck. I'm invested in all the characters so far and I hope I get to see more of them in the full game!
The artstyle is very unique too and works really great for this
I kind of am not a huge fan of the Permanent Marker font though, at least for the body text it's really distractingingly t h i c c and also while this isn't an issue for the demo, it makes the renpy sync code a pain in the butt to read.