Interesting design. However, I can't quite get to grips with what I'm looking at. It kind of looks like a skull, but not really. The warped features and the mouth makes it look like a rubber mask, rather than an actual head. Good pixelling technique, but the shape itself seems odd to me. Also, the eyes seem very pixel-y compared to the rest, due to the very sharp white "+".
disturbing, not much more to say .. it freaks me out.