The altered consciousness of sleep is a common playground for horror cinema. Dreamlike states offer pliable logic and room for outrageous visuals, and it also preys on a universal fear of vulnerability, with a snoozing body no match for whatever ghouls and goblins are in position to attack. “Don’t Sleep” is another addition to the ongoing exploration of bedroom exposure, though it initially takes a more psychological look at the dangers of nightmares, eventually transforming into a weirdly elaborate fantasy for a feature that opens with the visual of a decomposing woman snacking on a dead rat. Simplicity doesn’t interest writer/director Rick Bieber, who endeavors to muddy the waters of his genre effort, hoping to provide more of an intellectual ride before launching the film into space. Parts of “Don’t Sleep” are satisfying, but the majority of the picture struggles to land frights and character insight, shedding appeal as it lumbers towards its bizarre conclusion.   Read the rest at Blu-ray.com