Hi!
1. The music is the best I can manage I'm afraid :) It's why there is an option to turn it off.
As for the dialogue beeping, that's becoming a common criticism. It really didn't sound that loud or annoying to me, but I suspect it's a difference in hardware and emulation. I'll see if I can address it some time in the future.
2. When in doubt, hit the interact key. Exploration and experimentation are important! Alas, trying to fit everything in 48K means I have little to no space left for additional text.
3. It seems you wandered right into one of the tougher sections of the game first. There is a way to make the ghosts visible if you can find it, but it is possible to solve the area without it. If something seems too tough, it may be best to leave it for later or to find a different way to approach it. It's not the only part of the game that needs to be 'solved'.
4. My previous game was a bit linear with its objectives, so I thought this time I'd let the player discover things on their own.
The village to the west of the starting location is probably the best place to start. The ghosts are only found on the haunted moors to the east and only come out at night.