"Pirate Music"
Author: migfus20
https://opengameart.org/content/pirate-music
Tags: pirate, orchestra, dark, drone, Action
License(s): CC-BY 4.0
Crystal caves
Author: outer123
https://opengameart.org/content/crystal-caves-0
License(s): CC0
Resultant license: CC-BY 4.0