Love the atmosphere and character concepts here! Curious, are you planning to keep the Pixabay/YouTube audio long-term, or would you ever consider custom music for the game? Happy to help if there's ever room for that.
I recommend you send this message directly to the game creator on his Bluesky, @nekoblackcat.bsky.social, or his Tumblr @nekoboydreams. You won't get a satisfactory answer here.