This NES-style 8-bit BGM is inspired by towers in retro RPGs. It is eerie, scary, crazy, and dark, so it fits well when used for caves and dungeons.
It is recommended as BGM for game music and for other parody-like productions of RPGs on YouTube, variety shows, etc.
I have produced this piece while adhering to the NES/Game Boy era restriction of a maximum simultaneous sound count of 3 notes.