I played this game expecting that it'll end in around 30-45 minutes but somehow it took me around 1 hour and 30 minutes to clear it. YOU LIED TO ME! /jk
I love how great the narrative is. Diotima feels alive as a character, and the other characters' conversations are also great. Having multiple ways to clear some stuff is also a plus. There was a time when I was like "oh no, I skipped X haunted part and didn't get Y argument, what should I do with this one that needs Y argument" and I found out that I can use another argument to solve them instead. The spoilerless walkthrough is more like hints than an actual walkthrough, but I get that it's kinda hard to make a real walkthrough without spoiling anything in this game.
The only problem that I encounter while playing the game is the one that I need to do to advance Suika's conversation. I didn't notice if there was any change after the first 'QUESTION', so I kinda stuck there until I open the spoiler walkthrough. But only for that one. The rest is kinda solvable if you think hard enough. I did try to do some brute force methods which fail miserably, but I actually managed to solve them when I stop and thought for a while.
Great job with the writing there!