To be honest, if I were a developer of this VN, I would do the same thing and start redoing everything from the code itself: while the use of imagemap: function in some places looks appropriate, a bunch of "entities" in the form of the Character function instead of the, like, 5-6 usages of DynamicCharacter function doesn't look serious.
But apart from that, I believe that "remake" of this VN will come out when its ready for it. Don't overwork yourself because of this project, otherwise you'll definitely break your mental health. 🤝