Don't Blink

Faint hint of a spoiler ahead: There could be a lot to go on here. But the worse for me was how trying to understand the "rules" of what was happening was very distracting. How does any of this work??

In its favor, it didn't go with the "turns out they were dead and in limbo or some shit this whole time!" stupid ending I was expecting. On the down side, the ending is still stupid, and it doesn't matter anyway, the entire movie is stupid. I like the bare premise, but cruddy direction, bad acting, terrible dialog, and too many (poorly done) jump scares add up to a big waste of time.