Question: In "The Killer Cut" DVD, there is an interactive menu with REALITY, DREAM, and NIGHTMARE on it. Each can be clicked to go to the main menu, but what is the difference among the three?
Answer: There is no difference it's just for show. I've clicked on all three and it takes you to the same place.
Answer: I believe it's both a red herring (Oh, another slasher teen horror) and an attempt at making it more believeable that there are these killers chasing Cassie throughout her 'dream'.