The somewhat unpolished prose full of strange phrasing is probably the only big impediment to enjoying this. There's a sense that the game is sometimes being weird on purpose and sometimes by accident, and the difference isn't always easy to tell; I think I only got that the protagonist was genuinely meant to be saying a lot of offbeat stuff during my second read. A lot of worldbuilding is conveyed implicitly, too, which would be way easier to stomach if the writing felt more purposeful with its lack of clarity. (Just a random example of the kind of thing I mean: the game uses "young witch" to mean "new witch", which initially made me believe the characters were like 13; I think that sense of the word is too old-fashioned to really fit the voice.)
But the story is not bad, though it comes off as a bit hurried as a result of the central hunt for the lost cat being scarce with twists and turns and a lot of the game just being drama between witches. The world is interesting enough, too, especially given its inspirations in a meme. There's a lot of intriguing stuff the plot doesn't even really touch, like witches apparently doing jobs for the community like in Pokémon Mystery Dungeon. If there's a missed opportunity, it's probably the protagonist's curse never coming up – by the time the story gets to the buck, the reader probably understands that there's something special going on with every witch, and it just feels like a Chekhov's gun that never fires. I recall your idea for what it would have been from the stream, and I think that would have been an excellent closing gag or something.
Art-wise, it's all nice and charming, and the character designs convey a lot of personality. I'm maybe not completely on board with everything happening with the UI (the font is pretty small, and using it to hide content on purpose maybe feels too janky), but it's nice to see experimentation. I will say that since the game is all NVL mode, it would have been nice to see the writing take advantage of that as well with longer paragraphs and novel-esque flow of prose.