Have I read Phenomeno? I QC'd the English translations lol. Or so I say to sound cool but it was just a spontaneous personal project a friend of mine did on a whim. He ended up doing the entire first volume in a weekend and I edited any typos I found as I read it right after he finished each chapter. It was definitely a memorable weekend several years ago when we did that. It probably makes my opinion of the story better than it might deserve to be.
Incidentally, I was just reminded of Phenomeno when a horror anime topic was brought up recently. I didn't think it was all that great, but it was a good horror read, and I feel most horror are bad so it kind of shifts the average and makes Phenomeno above average for the genre despite not being amazing. Then again, sasuga Nitro+ I suppose. I'll say one distinct praise I have for it: Phenomeno does vomiting like no other. Just look at this beautiful excerpt
Yoishi is truly the greatest vomiting heroine.
Probably because it is likely the best visually directed VN ever. The standard art alone is breathtakingly beautiful, but the actual animated scenes are just levels above. IIRC the partial patch covers the amusement park, which is kind of the pinnacle of the VN imo, which isn't to say the rest is bad at all but just some of those scenes are just that god-tier in quality. I've reread the final confrontation with Flat Snark so many times. Combine that all with what's basically a perfect soundtrack and incredibly solid story writing, and that's what makes it tied for my favorite VN ever. Now just have to wait about 20 more years for Mahoyo2.