Sonrisa mortal

The Smiling Man's eerie grin adds a haunting layer to the story. I'm curious whether this was based on real fears or purely fictional imagination.

The fast-paced unraveling kept me on the edge of my seat, but I wondered if some moments could have been stretched out for more atmosphere.

The gritty urban backdrop seems to add to the story's dark tone. Would the story feel different if set somewhere else?