@FC I'm still not sure what I'll do with the music. I haven't really touched that yet. So much to do on this hack. When the time comes I'll see if you can help, if needed.
I've worked some more on the hack. as is the case with changing things, some people may prefer the old version. But I changed the city to a not so dark theme. It required writing a lot of assembly code to draw those road tiles, as the original was simply a repeated blank one.

Added someone to the lyrics screen (so many calls, she's bored):

With this I hope I have covered every relevant character from the movie.
I'm working on the game's ending. So spoiler ahead:
Also, not sure I've mentioned this already, but I expanded the ROM (2 extra PRG banks) and now I'm using a crystal clear "Ghostbusters!" shout. Credits for that go to NewRisingSun. I wanted to have two versions of the hack, one not expanded without the shout and one expanded, but this was complicating things and was one of the reasons I stopped hacking this game. So I decided to just go with the best version.
Other than these, I've been fixing some more bugs. Still no release date in sight.