Enemies do not have "vision cones" in the traditional sense. Instead, they have hearing radii . Guards in this game are blind; they patrol in the dark. They react to sound. You can "Sneak In" by throwing a bottle against a far wall, but if you Destroy a light source, the shatter alerts every guard within a 20-meter radius. It forces the player to choose between darkness and silence.

The jump to v1.0 marks the transition from early development to a complete, polished experience. Ankoku Marimokan has focused heavily on the "game feel" for this milestone:

(Within the niche eroge market).