"Adventures in Adventureland" by Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/by/4.0/
"New Platformer Pack (1.0)" by Kenney (kenney.nl) Licensed under Creative Commons: Zero, CC0 License http://creativecommons.org/publicdomain/zero/1.0/
"Sniglet" by Haley Fiege (theleagueofmoveabletype.com) Licensed under SIL Open Font License, Version 1.1 http://scripts.sil.org/OFL