After watching a WMG video on youtube, I think that I should clarify this:
The OPK version that gameblabla posted has a big problem, it can't load the game configuration files.
Because of this the controls are misconfigured and the game has an strange control scheme(this is not the intended control scheme)
Also, For this same reason, the music and sfx volume are muted each time you launch the OPK.
You can rise the volume levels at the service menu( Music volume and sfx volume should be 50 and 25 respectively)
For Now, I recommend you to use the non-OPK version until there is a error-free OPK if you want to enjoy the game.
Sorry for the inconvenience, Hope this clears any misunderstanding.
The new OPK version already works properly