Well, I haven't really paid much attention to the BGM before, and I’ve always struggled to find suitable tracks. If I can't do something to my satisfaction, I just won't do it.
However, many people have asked me about the BGM, and I’ve learned some tricks to find great “universal” BGMs that work for most scenes without spending too much time. So, I will be adding all the BGM after the Kurumi chapter in the next version.