As someone who LOVES characters trapped in a room films, this one was unfortunately a complete disappointment.
While it's obviously a lower budget film, that does not preclude it from having the possibility of being brilliant!
It's not money that makes actors and a story brilliant, it's competent direction and a good script.
Something it was obvious from the start this film lacked.
Odd character interactions, awkward dialogue make this a very... annoying film to watch.
I eventually got the feeling that the people behind the camera did not take the story very seriously. Allowing characters to react (or rather, NOT react) appropriately, ruins the tone of the film and gives it an oddly humorous undertone.
NOT A SPOILER
The man in a very early scene has just heard some chocking news, and all he does is sit with his head balanced atop his clasped hands like an intrigued school boy.
The women on the other hand look appropriately scared/in denial/confused.
In fact, the only actor in the whole film who sold the film's story consistently when others faltered was Vee Vimolmal. She really carried everyone else!
In conclusion, without spoiling anything, whoever made this film tried to recreate Coherence (2013) with more science babble, without understanding that it's the character interactions that are truly important.
So I urge you all to watch Coherence instead.
It took me at least 3 viewings to keep track of all the multiple dimensions and characters. It is simply a far superior film and mystery. (As are the first 2 Cube films, if you're into people trapped together genre!)