Heh, you guys are awesome.
Mathias: yep it's toned paper with opaque white pen, I don't know the exact type but it's made by sakura- same peeps that do micron pens.
The "eye" on the back of the head is a recurring symbol in the world and is supposed to represent a sort of omniscience and knowledge of the raven who serves a demigod like function in the world. I know that may be a bit hard to convey with pixels and overly simplified geometric shapes, but I really don't mind any ambiguity- sometimes that's better than clarity anyway.
But i think it's pretty unanimous that #1 is better, and I agree, That iconic shape fits with the mystical and ancient vibe.
Mathias: I'm totally a sucker for that stuff, perhaps it can happen off screen so as to keep it subtle. Have you seen/played Antichamber?