I think this is a super solid foundation!
I like the art, even though its not perfect quite yet, its still all there, and the more polished art looks really good!
I also think it was a cool choice to incorporate the little events in certain interactions, I managed to find Biboo, and the prompt for the Ina doll with FWMC. I don't play a whole lot of VNs so I don't know how common it is, but I haven't seen it before myself, so props for that!
Also think the dialogue was pretty well written, and the reactions felt genuine to the talents as well, so good job there!
I didn't mess with modifying the text file at all, but giving the player the option, and instructions on how to do that, is really cool, it would be awesome to let players submit their own routes and stories and let the other players check out their content!
I would say that a quick restart or something along those lines when reaching the time limit, or certain endings would be nice - its not hard to just close out the player and boot it back up again, but it was a little confusing when I got the Biboo ending and everything just locked up on me. But if I had to nitpick anything in it's current state, that would probably be it.
I think this is a great result for a jam project, and it sounds like you're already planning to come back and iron things out, which is awesome, would totally come back and check it out after some updates. Great work!