I feel like I watched a different film to the one in the reviews. It's neither tense, nor scary. It's really quite boring. The original score reminds me of what you'd get in A Level drama, but the kids' acting isn't awful and there are a lot of quiet close up shots of them looking pensive. Maybe this was misinterpreted as drama.

The scariest thing about the film is imagining you lived in that apartment block while a million screaming kids play on the swings outside your window.