I know you don't have to but i'd be kind of cool if you gave credit to the assets used (music, sounds? graphics?), for example the music is instantly recognizable as Brandon Morris' work. You don't have to list every item you used, just Like a "Assets" category with Art/Music/Sounds" subheaders and then just lists of usernames who contributed.
(Feel free to delete this post if its ruining the vibe =] )