You know that Lord of the Rings trick where in the camera shows you crying women and sad people just to tell you that the troubles that the heroes are facing is no joke then proceeds to drill into your head how much serious it really is by making bad shit totally happen? This anime employed that.
My only complaint of Kaji Yuki whining voice aside, it employed the earlier said trick to perfection to the point that the first episode was a statement in itself about human fear, complete with concluding narration of how humans lived in fear and all that. That said and the source material being about human complacency symbolized by walls vs. the human desire for freedom by the MC, I’m really looking forward to this anime and add to it the gorgeous animation that emphasizes on action scenes and nice BGM. The first episode was already a statement and hopefully the episodes that follow will have the same kind of intensity and quality.