Kinda tough providing a lot of feedback for something that's essentially a prologue, but I'll do my best here. It's got good bones, but it's very unfinished and there's much left to be determined by where the story will go in the future.
Spoilers from here on out.
Implementation of Theme:
I'm gonna be honest, for what strengths the VN does have, this one isn't getting through to me. What we're looking for here is "a light in the darkness" and while there's certainly a lot of darkness with the post-apocalyptic setting, friend deaths, monsters, and the whole literal blindness thing, I'm not catching any "light". Maybe it's supposed to be Dean? But it seems like Dean might also be the monster that's trying to kill you, and I'm not entirely sure what the MC's relationship was with him before current events, so that would take some guesswork and assumption. Maybe there's something that I'm missing but it definitely doesn't feel clear.
Story:
There are some really fun ideas here: I get anxious about protecting my glasses in the real world where there's an optometrist 10 minutes down the road; add the additional strain of the apocalyptic setting and that gets real stressful. Leaning into the blindness and removing the visuals from the visual novel is interesting as well and the voices in the MC's head are also a nice touch, very reminiscent of Hellblade.
Where this story is currently lacking is detail, or rather contextualizing the details that are present. There are a lot of names being thrown around, but with no visuals and very little backstory to accompany them it's hard to keep everyone straight and parse what importance, if any, they had to the MC. Some more details about what the threat is outside and why the MC is protected (or at least feels that way) would be nice as well. Like, yes, it's a horror story so leaving the safe space is always something you don't want to do, but it would be better if we understood more of why we didn't want to do it so we could be nervous and afraid along with the MC.
Presentation:
As stated above, the blind protagonist angle is really interesting for a "visual" novel (and also a very convenient way of not having to worry about sprites and backgrounds). With that said, as some others have pointed out, the best way to capitalize on the deprivation of one sense is to emphasize the other - more manipulation of sound to make the MC and reader afraid of what's out there could go a long way. I also agree that the backgrounds don't necessarily need to be solid colors - that's not really what the MC is supposed to be seeing, so even just blobs of different colors within the frame could be helpful. That could also help set up scares when one of those blobs turns out to have eyes and gets much closer very quickly or something.
As far as other presentation issues go, there are a few typos within and there's the somewhat random error that gets thrown at some point in the early story.
Creativity:
Best category for this one by far, mostly for the reasons covered above. I know time was short for the jam so there's quite a bit left to go on this one, but I'll look for updates later in the summer to see how you continue to develop the idea.