It is a low budget indies film and as such, I thought it was done pretty well considering others I've recently watched. This is attributed to both the acting as well as the screenplay. What I hate most in amateur films is overacting and in this film the actors, both major and minor, both seemed to escape that and did a very good convincing job.
The story was reasonable, nothing spectacular, but props on the mid film twist. I didn't see that coming. However, I felt that like a lot of films I've seen recently, it started out strong but ended weak. The beginning really do keep you engaged and wondering how they ended up in that situation, however after the mid film twist, then it seemed to run out of ideas and they were just winging the script.
My suggestion is take a little more time to develop the story, put the twist at the end, not in the middle. You lose your whole build up at mid point, which is why the 2nd half was like a completely different movie. I would give the first half a 7 and the 2nd half a 3, average both together at 5.