I liked the use of audio,  as well as the lighting which encourages the player to keep going, for fear of being caught. The player doesn't really know who they're running from, but they know that they have to keep going. The infrequent blinking lights of the terminals also help to this effect. They keep the player wondering whether or not they're still going in the right direction, and the player wonders if they're about to take a wrong step and end up being caught.