Thank you for playing the game! The music could be disabled in the settings as well as sfx (separately). As I have some peculiar melodies but only in my imagination and dreams, I plan to compose more songs for different bosses in the future and complete the current demo tracks. For now, I wanted to have some "music" in the game to see how it goes. Volume settings for music and sfx will be added some time in the future (because you could always turn down the main volume or similar).