There's no sci fi in this movie which would make it more of a psychological thriller if there was any real tension or suspense at all in this total miss of a production. But there isn't. Instead what we have is a completely formulaic absurdity. All the clichés appear: the paranoia, is it real or imagined, the annoying kid that keeps getting the group in trouble, the one dimensional point A to point B plot progression, etc etc. It's a shame because the implied premise is quite good. But It's just bait and switch. You never really believe that anyone is really going to be hurt so there is zero suspense. And there's no courage in the story to go anywhere that we haven't seen 100 times before. And there's absolutely no 3 act so there's no intelligence to the story in the end. There's no processing of tension because there's nothing there to process. As the credits role you're left with "meh". Which is a crime given the talent in the cast.
Skip it.
Skip it.