We have added basic materials to all of the walls, floors, and objects in each level: the walls and floors a matte white, and the hallways are matte black white glass chards sticking into the broken hallway. In addition, we've added signs and arrows to indicate to the player which direction to head in, where an elevator will take them, and tips for the player to help them complete the level. This includes indicating to the player to stand still on the hallway platform, or to stand still inside the suit repair station in the equipment room.
-Kristen