@XMFR64 , You'd have to disassemble the machine code of the game and understand where the picture extraction is happening there. I doubt that it's encrypted, just packed in some way, probably.
I wish I had time to do that, but unfortunately, I don't. I'm probably not that good at writing C code to create an extractor, either. The most I could do is to figure out the procedure of extraction or where it's located. Also, ILSpy with reflexil can't seem to recompile changed code of a Unity game, so you'd have to use Unity itself, I guess. I don't really know.
Unity games are not easy to mod or crack, every one of them could have a different method of packing and unpacking of the images.
This one clearly has a different method of handling images from the one that BB has.
@bad boy , this 99 is there for you not to try and bail. There's no content there yet.