Stairs are displayed up or down if you stand nearby, and disappear, after on them to pass. It is necessary to reach a door to leave this labyrinth. Go on appearing stairs or jump on the lower floor to find a way. You also can step on columns in rooms. But if you fall to the lowermost floor you move to an initial position.
In a Interface editing mode you can adjust controls you most like. Simply touch the control button and drag it in other place.