The voice feels intimate and threatening at the same time, which makes the whole piece unsettling in a good way. It reads like an invitation and a warning spoken in the same breath.
What works especially well is the rhythm. The short commands, the repeated questions, the slow build of pressure, all of it creates that creeping sense that something is already too close. You keep the imagery tactile too, pulse, damp, warmth, stone, darkness, so the fear stays in the body.
And the ending is good because it doesn’t overexplain. It just leaves the reader standing there, waiting for the floor to open. That kind of restraint gives the piece its teeth.