It entertains. It's not the best sci-fi film I've ever seen but it's reasonably high up the list and as a bonus, it keeps getting more interesting as it goes along and thankfully, the ending was fitting.
A few suggestions for improvement:
The characters all seemed like strangers in the beginning and they all waited a set time for their turn to speak which gave the film quite a stilted effect. George Finn was the only one who didn't 'look' like he was acting. Danielle Panabaker annoys me in most of her work because she tries to pull off being innocent and sweet when the character she's playing doesn't need it (either that or she just isn't any good at being 'sweet') - it comes across as being quite fake. The camera could have been expanded on for example; its creation, design, and they could have experimented with various settings. As it stands, I still don't know how they figured out certain things about the way it functioned (but I might have missed the explanation while munching).
Some praise:
Matt O'Leary pulled off a really funny 'wtf are you talking about' moment when his best friend and girlfriend were casually discussing a dead body. Although the opening scenes were jarring because of the lack of chemistry and low budget feel, with literally every scene, the film got more and more engrossing so stick with it. The story was really well written. It progressed at a good pace and although George Finn's character development seemed a bit over the top, I thoroughly enjoyed the film and for once, the ending was fitting and extremely satisfying.
I think everyone involved should be really proud, any criticisms are fairly minor, and I can easily recommend this.
7/10