Well done! Super catchy and fun, also works well in the game.
I think one hard part about rating this challenge is how to determine whether something is a boss theme or not. It's definitely spooky but for me not 100% a boss theme, though I could see it working as one in some cases.
A very fun/playful and catchy take for this challenge. I love the marimba version! Are you the one playing the marimba?
Love it!