I'll be totally honest, I came for the cast. As an Arrowverse fan, having Caity Lotz, Brandon Routh, and Tom Kavanaugh in a cheesy sci-fi flick is enough to get me to click play. College me would have been thrilled about the addition of Dane Cook, as well.
Was this a great film? No. But it was entertaining and well acted, even if the end left me with a giant case of WTF. I'm definitely leaning towards the "it really was all just a simulation" theory, but you could make all sorts of theories about the ending and probably find enough clues throughout the movie to make it stick.
If you are a fan of the Arrowverse and you're into guilty pleasure sorts of movies, I'd recommend this one just for the hell of it. An easy way to pass an hour and a half (and an additional hour of Googling the ending afterward).