The Battle Cats | Tiredness + Ogre Island + RNG = ???

Hi! Wait! The backgrounds have been the same for all the manic stages but not this one! What does it mean? It symbolises tiredness, both metaphorically and me forgetting to keep the same background in editing xD Regit If the music was Ben Sound: http://www.bensound.com If the music was ProleteR: https://www.youtube.com/user/proleterbeats If the music was Kevin Macleod: "" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/