The Heart Room was a room in Olmec's Temple. The simplest of rooms, the only objective was to hit an actuator to progress through the room. However, its location allowed access to three or four rooms at any given time in the Temple, making it a key point in run design.
True to its name, the Heart Room's walls were painted like the interior of a human heart. While the layout of the room did not change, the colorization was slightly different in the Season 2 incarnation of the Heart Room.