It started out fine. The tone reminded me a bit of Cube (1997) and I have to say that I was intrigued for the first 30 minutes or so. But in spite of being a mere 90 minute long movie, it drags. Which reminds me of Richard Kelly's The Box (2009). Both movies have an interesting premise, which might be enough to fill more than an episode of a show like The Twilight Zone or Black Mirror, but not an entire feature film. The symbolism is very heavy handed and could have done with a bit more finesse.