Quickly?! *gasp* But I... I... replied late. :(
Omg. I checked it out, and you're right! There are a couple of songs that I still hadn't replaced! I'm glad you noticed it!
(See, the way I organize resources is by categories, and then by artists/musicians, but since I change filenames in-game to make the coding process easier, I mess up 'which belongs to whom' sometimes. I checked the tracks out and it seems like they're from this site which also offers free BGMs. I'll be more careful next time and thank you so much for the heads up!)
Edited the credits. :)