Liked the script. Loved to nods to other movies yet didn't feel clichéd. Ending caught me off guard, which is VERY strange, and VERY good.
Directing - wow. Amazing. What an eye. DOn't mean to be mean, Mr Thomas, but you're got the directing skills of Hitchcock and M Night - do what they do and play bit roles, but please please keep on directing. I can think of many horror movies off the top of my head ("A-list") that made mucho $ in the theaters and can learn a thing or two from this movie. Keep it up.