Spoilers follow probably:
Theme: Franky, I'm not sure, but I felt like I felt the echo of it in the brief window of the work.
Story: Taking an isekai more literally. I appreciate it . I think you did some interesting things, and I liked a good chunk of your prose, but I don't think we needed the beastman lore info dumps. That felt against the ethos of the work. I feel like the protagonist would tune it out even if it was being told to him, because it's not real.
I feel like it doesn't quite satisfyingly lead up to the conclusion, but I do like teh attempt.
Presentation: This is the one work where I felt that the silence was diegetically chosen, outside of the sfx, and I appreciated that choice. I also liked your custom art.
Creativity: I appreciated your take on the isekai narrative, and thought it felt comparatively fresh, albeit I don't know how I felt about the hallucinations being valid/the root cause. I enjoyed that satire of the "culturally unaware" greeting.
Overall thoughts: Interesting approach, that I think needed a little more time in-universe to reach teh payoff it wanted to approach, probably with nodding to the genre pre-requisites with some time prior to the isekai, and more time in the isekai (or at least, swap the info dump for something else).
terse, short attempt. Well done.