fnaf ost used is purple smasher from fnaf sb in the balloon world arcade game.
tried my best to complete this one but I couldn't :(
I love the fnaf movie though, it was so cool!
ps: Elizabeth looks this pale because she died in that state. she had been trapped in the stomach hatch of CB and eventually passed away from it, so her ghost represents that condition she was in. which is why other ghosts aren't as pale and sickly as she looks. they all look different depending on how it happened.