Severed Faces Zone

Prologue
The Severed Faces Zone is an unlockable area, appearing 13th once it is available. It is unlocked by killing all the, randomly chosen, major enemies in an area. It doesn't count the bonus and boss levels offered by The Obol. In total, you will need to kill 9 enemies.

Sightseeing
The ground is faces, the walls are faces, everything is faces. The ground is lumpy from faces. Some giant heads are hollowed out, and you can enter through the eyes and mouth. These often act as homes for the Living Face people, who live here. They are unsuprisingly also faces.

Levels
Enduring 3 whole levels of face overload is a challenge, the terrain here is haphazard and the levels are infested with traps. Acid Spitting Faces oozing acid will spit that same acid at you if you get near, and Floating Heads will bounce around, oblivious to gravity and ricocheting off of the face walls. Contending with the giant Rolling Heads that slide down slopes, crushing all in their paths, will be difficult. Avoiding or dodging the falling Haphazard Face Pillars is pretty important too, and steering clear of the Acid Spitting Face Pillars, an even more deadly acid spitting face type, will be vital.

Knee Deep in Faces (Level I)
Traverse the lumpy terrain, and survive the pilgrimage to the giant face tower, the exit is at is base. But getting there will not be easy, though this level is relatively flat, large lakes of acid will act as barriers, forcing you to walk around, or perhaps sacrifice a chunk of your health and swim on through.

Stairway to More Faces (Level 2)
This level is incredibly vertical, spiraling face ramps will give you passage upwards, but falling acid and the usual traps will attempt to halt your progress. Knockback will be devastating here, staying in the middle of the ramps is ideal, but on some ramps, the middle will not be accessible, because the faces' lumpiness, they are sometimes too high for you to reach.

The Face's Fault (Level 3)
Vertical and horizontal, this level will test your mastery of the 3rd dimmension. A huge ocean of acid lies beneath, spindly bridges of faces link the islands, which are at drastically varying height. These floating isles become sparser as you ascend, and falling from way up there will result in your certain doom.