I've seen this game mentioned a few times in the context of "awful Famicom games" and thought it might be good for a laugh, so against my better judgment I've been taking a look at it. As mentioned in the linked post, it's all pretty straightforward except for the cramped dialogue windows, and I've made some tools to replace the font and insert text:
I expanded the text drawing area into the margins, but that's obviously not quite enough. I don't think it'll be that difficult to expand the box; what's trickier is that the game expects to be able to draw all the text in the space of a single vblank, causing nasty screen flicker if the message is too long (this problem occasionally occurs in the original game). Fixing that will require some coding work to distribute the drawing across multiple frames.
I'll look at this some more later and see if I can patch things up, assuming my interest holds out. If it doesn't, I'll just post the tools and you can see if anyone else wants to take a crack at finishing it. Honestly, this is probably good enough as-is if you don't mind abbreviating the messages a bit.
Incidentally, this game's password system is hilariously bad -- it doesn't seem to have any kind of validation at all, it just takes the data you input and tries to start the game from it. I managed to straight-up crash it
just by entering a few random characters.