I feel ashamed about that. Yes, I made the OST, but unfortunately, I had never composed music digitally before. I literally learned how to do it yesterday xd. PS: The boss fight theme is bugged. I don't know why, but the theme only plays when you press 'Esc' during the boss fight, sorry.
Im so glad to play a game that is not AI being. As a musician, I think the OST is kinda fire. The game looks even more impressive when I realize it was made by only one person.