Sorry, but too much left unanswered for me

Rating: 6/10 (27 December 2018)

Something arrives out of nowhere which causes people to kill themselves. A small group board themselves up in a house and try to figure out how to survive. It isn't easy.
Sandra Bullock heads a decent cast on this scifi horror which tells much of the story in flashback, by virtue of which we know that, 5 years later, Bullock and two small children are trying to escape, blindfold, in a boat. Our concern for the other survivors is therefore limited to the order in which they die.
While there is nothing fundamentally wrong with this idea - which we have seen before under various guises - your enjoyment will depend on how much you need to have spelled out. In A Silent Place, the nearest recent close relative, we did at least see the fiendish thingies. Here we don't. Nor do we understand how or why their malign influence works. And these are just the biggest of the unanswered questions. We also don't know why the bad business only works outside - can't these things get inside?
I'm sorry, I don't like things being quite so open ended. This good idea wasn't thought through at all, on the grounds that it didn't need to be. Some of the dialogue was good, but the story/script was horrible.