You are trapped in a stairwell, and as you delve deeper, the stairwell becomes increasingly abnormal and dangerous. Abnormal event, unknown monster, can you escape alive.

You need to move up or down and encounter many events along the way, some of which may block your path. You need to temporarily turn back and walk a few layers before returning. Some may cost you your life. As it goes deeper, the stairs will become older and covered with flesh and blood.

Some monsters may appear to attack you