I liked it a lot. I love films where the female lead isn't a girly wuss, even if she's the villain, and the premise of the thing seems really up my street. The snapping noises is an intriguing feature and I'm really looking forward to seeing the whole thing.
I didn't think the acting was bad, but like some of the others have said, there are much more important things for me personally in a film than the acting. The plot, build up, pacing and ideas behind the film are what I look for. I also loved the switch from dark to light, and the lead kind of reminded me a little of Lola from The Loved Ones, definitely a good thing!