Shane Carruth was able to make his film with a very low budget of $ 7,000. The film is based on the plot and the psychology of the characters. How do the protagonists react to the immense possibilities that their invention gives them? The special effects are almost absent from the film (there are only "normal effects").
At first glance the film may seem complex as there are many references to scientific concepts such as thermodynamics, entropy, the Feynman diagram or elements like palladium and argon. However the plot ends up winning even if it is a kind of puzzle that must reconstruct the viewer with the clues he can detect.