Thanks for the reply and clarification! Yeah, I saw the credits folder, but with an ending message like that, it was hard for me to put faith that the credits shown in the given file was extensive in the moment.
I'm sure you meant well, and I understand how frustrating it can be to have your stuff stolen. However, the practice of asking resource owners to keep a constant vigil over the internet in case someone happens to use their assets comes across as lazy at best, insidious at worst. I'm not accusing you of being either one, obviously, but there has already been an incident where another dev did something similar and it turned out there was a copyrighted resource in that game, so you can understand my initial reaction when I saw that message.
Good luck with Eden Drive! I hope more people take the time to play it.