I am probably the target audience, of which is maybe very specific, so obviously it works for me and i am biased:
This is great writing, great concept, anyone saying otherwise is not considering many things, budget for one. This is great use of location and lighting in certain scenes is excellent. The lead carries more and more as the movie progresses, and is supported by great cast, of which are not hollywood name actors, yet, but are actors.
Also, this industry meta type genre is for people who enjoy film and seeing new filmmakers create, with the understanding of filmmaking and respect for it, especially when you don't have a huge studio budget. I wish I knew the budget, but you can tell that there may be quite the resource compromises; the film is bigger than budget. When it starts getting dark about midway it especially looks great with shots and lighting.
BOTTOM LINE: it's an insightful type movie for filmmakers especially, and slasher horror fans. It's original, though the plot has been done before, it does it's own worthy version of the "Stage Fright" type movies. It's for the fans, the ones who love making movies and have dreams to overcome their fears and perform at the professional level.