Another reviewer called this movie "indisputably terrible". Well, I wish to strongly dispute his/her statement.
Yes, the movie is a mishmash of concepts borrowed from other films in the same genre - as are most movies which at least borrow some scenes/concepts/portions of the script from previous movies.
The purpose of creating a movie is not to create rocket science deep thought - it is to entertain. Viewers of the pseudo-horror genre already know before the start to watch the film what to expect. And this film does deliver at least a portion of what is expected, nay, demanded of a film of this type. There is tension, suspense, action, scenes of horror, etc. What the film does NOT do is create a thought-provoking environment where you are "deeply 'into' the film". It is entertainment. Only that, nothing more. And it delivers.
No, this is not "The Godfather" or "Inception". It is a mock horror film that will entertain you - once. I give it a 6.5/10.