A charming little game, a shooter where the field of vision is reduced in an attempt to be approximately realistic (around 180°). You can also hear the steps of the enemies, represented as footprints in the still-darkened areas. Ammos are scarce, so exploring the (kind of empty) floors is useful only to increase your resources - there's practically nothing else to find; its rogue-lite structure doesn't offer anything special since, more or less, all the floors look alike, and there is never a particularly different or noteworthy placement of enemies and resources