I have some files from the game, and I'm not sure what kind of compression method it even uses, but it does have BCH files stored inside. Here's some files if anyone wants to take a look.
https://www.dropbox.com/s/suu5xset4298px...h.rar?dl=0
https://www.dropbox.com/s/suu5xset4298px...h.rar?dl=0