I saw it a couple months ago, and I couldn't make sense of it. When I did a Google search when I got home, I found that no one else could make sense of it either, so I am fairly confident that it just didn't make sense, most specifically the final battle sequence with soldiers simultaneously fighting forward through time and backwards through time. It's not so much the story as the concept. I am a bit fuzzy on it since some time has passed since I saw it, but it tried to combine both time travel via leaping through time and time travel via rewinding time (and the rewinding happened while others were still going forward) which just didn't make sense. Maybe the whole point was that time isn't linear, but, if that was the case, the movie didn't establish that or provide any alternate way to think about it.
It was a headache to watch, and I don't think it's worth a second viewing to try to understand it.
What are your thoughts?