A collection of fixes for Hammers of Fate

It seems the music doesn't trigger from the latest texture, but from the underwater texture. There are usually two types of water: either water created by the level (which isn't a texture, so the music comes from the seabed texture), or water-texture, which is used to create rivers, lakes, and shallows. It's similar to lava and swamp, although movement is generally disabled on lava.

You can also assign a separate track to the swamp; it seems to exist in the resources as Terrain-Swamp.ogg, but it isn't used, and the water track is played instead.