This film had potential and if you're looking to kill time, it's quite alright - a good amount of suspense throughout the film. But like basically every other review here, the film it cuts to the credits without really explaining anything.
If you're looking into sci-fi apocalyptic movies and don't care for the plot, this is the right one. If you're looking for movies that have poor character development and a rather cliché ''world is ending run into the danger to save the loved one'' plot, then this is for you.