Thanks for the comment; as for your questions
I don't know if any tunes other than the menu screen also cuts close to other existing songs, it was the only one that I had recognized at least. The music in other parts are about the same quality though.
The characters are almost completely uninteresting. As far as I have gotten into it, the only characterization your character gets are one liners inserted interchangeably into intro conversation, while tutorial lady (who's name will not stay in my head more than 15 seconds) has almost no personality beyond pointing things out that are happening but are not visible.
I will try to include more elaboration into my reviews; I'm trying to avoid getting too long winded at the same time though too.