Blokamp’s feature debut, which came about when the Peter Jackson-produced screen version of the video game Halo fell apart, is a sharp-edged science fiction parable that mixes metaphor and violent action with such dizzying confidence that you leave the theater feeling charged and alive. It’s proof positive that a film can dazzle your senses while also wringing your emotions and teasing your brain and your morality. (Hollywood Jewel 16, Waco, TX)