Bug Fixes of the Day #2

Fixed a bug that caused the Disco Boss's health bar to not reflect the current value when playing on Casual.
Fixed a bug that caused zombies that died to shotgun blasts to constantly fall to the right, to the right. Everything you own in a box..nevermind.
Characters at the main menu should now be properly lit. ːsteammockingː
Fixed a bug that caused zombies to disappear instantly at the end of boss fights, instead of dying a proper death.