The camera work and the actual look of everything was well done for a movie with what I assume was a shoestring budget. The premise is fairly simple, bit of 'Breakfast Club' in a prison attempt where the students are all hunted by an unknown assailant. And that's about all there is to the plot.
The problem is everything else. It's hard to criticize the acting because the dialogue and actions they say and do are so...juvenile and stupid that I don't think any actor would have been able to make them work. It's obvious the writers have no idea how modern teens talk or behave. They're supposedly arch-type teenagers but they're archetypes lifted from like a 2005 Nickelodeon sitcom. Nothing that happens ever has any real impact, there's no emotional connection to any of these characters because they're all sort of unbearable and annoying. There's no sense of dread or fear. It's just a group of "teens" making stupid quips as they wander around a prison until one of them supposedly dies.
I say supposedly because you never actually SEE anything that happens. Literally all the violence, if there is any, happens off screen. You never actually see what happens to a character when they're killed off. You see them being approached, a scared face, and then the scene is over and the story has moved on already.
Basically if this is a horror, comedy, and drama genre movie without any actual horror, comedy, or drama in it...then what is it? That's the feeling this movie leaves you with. It's nothing. It's not offensive really, there's just no point to watching it. It's just some fairly well shot unimaginative boring nonsense with a couple funny lines. Can't recommend it.