v2.1

* Removed extra background stuff that wasn't visible from stage
* Moved main background from bg6 to bg1
* Top half of the ground (the Containment Unit) into the background

I mainly made these changes so that you can see Apocalypse Bird in the background when you are using Roland. Hopefully I didn't break anything.

v1.1

* Added all of the core suppression music and made it play in the same way to the Floor of General Works and Mephistopheles stages
* Fixed some credits for music

v1.1