A short (30min) sci-fi film doesn't give much time for plot or character development but fundamentally it is like a great short story. The acting is fine and the characters interesting. Basically draws up some questions about the feelings of a border force policeman who is about to retire - guilt, value of his life etc. There is a 'new earth' that many hope to go to (and he hopes to retire to) where everything is expected to be great, but meanwhile people are struggling to survive on the original earth in a post industrial setting. Obviously nobody likes this border force because they kill lots of people hoping to make it to new earth.
Effects are excellent, especially considering it is only a 30 min film. Could easily be made into a full length film, and would probably be better in that format, allowing greater character development, especially between the two main protagonists. However, there aren't really loose ends, everything ties well together, and although there is a 'twist' it is pretty predictable, though doesn't take away from the general sentiment of the story: even in a rough world people aren't all bad.
P.S. there is some blood and guns, so for an adult audience, but it is not gratuitous (I hate overly violent films, and this isn't one)