Who is this movie for? As I watched it, I couldn't quite put a finger on what your intended audience was. At first you seem to be a satire of terrible low-budget filmmaking - the pretentious director who wants to make 'art' out of a terrible premise, the producer who just wants to ensure that they get their money back, the actors/crew with four jobs each...
If this was your intent, though, you'd think that there should be some depth to this film beyond actually being a terrible low-budget film.
While I'm sure that low-budget filmmaking can be an extremely stressful process, and any number of narcissitic low-budget films have certainly mined that well for drama, it doesn't work especially well in a horror context since you just wind up presenting characters in the least favorable light imaginable, bitching at each other for a third of the film before the killing starts. Unless your desire was to make us feel contempt for the characters, so that we wouldn't be sad when they died (a theory that the entire rest of the film wouldn't support), all you've done is create a situation where it's impossible to care about how the events of the film play out.
If you're making a satire, just make a satire. Putting all of these comic elements in the top half of the film just creates huge tonal inconsistencies (exacerbated by the fact that they follow an unpleasant rape/murder sequence) that leave us unsure how we're supposed to respond to the rest of the film.
Also, why didn't they just leave? At any of the dozen moments that they had an opportunity to do so?