Hey Zi-end,
I verified that the archive.rpa file on my local machine matches the sha-256 hash you listed. I have also used that rpa to run the game locally on my PC and on several android devices and they all have full audio. You may want to try some of the ports made by other porters. I believe both DarkAssassin and Koga have put out single apk versions. They won't be as high quality as the rpa version I create but they should still look fine on mobile devices. Hope this helps.
Ix