Adding new BGM to the game isn’t necessary, but I am sure some people will enjoy it, I would. How about Snake Pit music being some sort of snake charmer music or just environmental sounds like lava and hellish screams when you’re inside Abyss of Demons. On the downside, this will make RotMG’s file-size or cookies you import into browser larger. Or if you use Flash Player it might load for longer? Might not be big of an issue but yeah.
Mod note: Moved to Ideas > Dungeons & Enemies
~ BMJ