For the (very) few people around here that have even heard about this game:
Taken from supplied read-me like text-file:
v Unlooped, haven't found a good way to loop it.
x Unlooped, not necessary.
~ Looped, but maybe not perfectly (in my eyes).
Main theme: x God Hand (Credits BGM)
Ep 1: - Gene's Rock-a-bye (Stage 1 BGM)
Ep 2: v Bald Mountain (Stage 6 BGM)
Ep 3: ~ Forgotten Song (Stage 7 BGM)
Ep 4: - Floating Fort (Stage 4 BGM)
Ep 5: - The Gang of Venice (Stage 5 BGM)
Ep 6: - Higher than Heaven (Stage 8 BGM)
Myth: - Anthem of Satan (Angra BGM)
Stage alts: - Duel Storm (Azel 2 BGM)
(raids) - Dark Matter (Trident Demon BGM)
Boss/PVP: - Handsome Dynamite (Tiger Joe BGM)
Final stage: - Devil May Sly (Azel 1 BGM)
Campfire/Sq: - Sultry Night (Casino BGM)
Event: - Fire Works! (Human Fireworks BGM)
Amuse park: - It's a Smile World! (Stage 3 BGM)
PVP loading: - Be Ready for it (Menu BGM)
Slime race: x Chihuahua Soldier (Chihuahua Race BGM)
WC Event: x Sunset Heroes (Mad Midget Five BGM)
I left Lunia's credits BGM intact, for obvious reasons.