Really strong submission, without much in the way of weak points. The art's nice, the layout is both functional and aesthetically pleasing. Maaaaaybe I'd like it to have an accent colour, not everything in the greeny-blue spectrum? But I'm stretching for things to pick at there.
You're taking on a very complex topic for a trifold. I think you did a good job of it but it's one that maybe wants to be a zine, as that would leave more room for e.g. lists of stuff found at each location, more fleshed out NPCs, etc.
Still picking at nits for the sake of having constructive criticism: the guy getting meowed at by his cat seems a bit twee for a horror story. The guy working to pay the bills to save his wife who is already dead in real life is more the kind of vibe I'd expect.
It isn't clear why the reactor can't be reached in the Mirror World.
Anyway, as you can see, my criticisms are pretty minor. I'm not done reviewing everything yet but this is another one that'll probably make my Top 5.