Moon.

Reviews from Rotten Tomatoes.com from Top Critics:

A heartfelt, if self-consciously derivative drama of human loneliness. Peter Bradshaw, The Guardian

Moon actually gets a little dull in the later reels, just when it should be peaking in mystery and tension. Dennis Harvey, Variety

The film's ideas are interesting, but don't feel entirely worked out, and Mr. Rockwell's intriguingly strange performance (or performances) is left suspended, without the context that would give Sam's plight its full emotional and philosophical impact. A.O. Scott, The New York Times.

 A well-assembled sci-fi thriller. Duane Byrge, Hollywood Reporter.

This film received mixed reviews - some people think that it was a powerful, moving performance by Sam Rockwell about loneliness. However some think that its a bit slow, dull and nothing much happens because it is slow paced action and basic special effects.  

This is not a Four Quadrant picture because it is certificate 15 which means a children would not watch it. Also, it may not appeal to most teenagers and adults - it would appeal to sci-fi fans and people who have seen Space 2001 because there are strong links to that film's style, with the basic special effects, slow paced action and set. Also people who like lots of special effects, CGI and fast-pace action are not likely to watch and enjoy this film because there are not many special effects and the story is more about Sam's experience in space alone, and it's effects on him rather than action-based story about exploring space.