https://studio.youtube.com/channel/UCZhkLaB67rHVjwH1PFai0SA/music
https://freemusicarchive.org/
https://www.newgrounds.com/audio/featured <- Pay attention to the licenses on each song.
https://opengameart.org/art-search-advanced?keys=&field_art_type_tid%5B%5D=12&so...
https://incompetech.com/
