Never even played Quake but these things are so iconic and this is a great picture of one. I also really like how you've done the mouth.
Yes! I love it! Glad you're still pixelling and this is really very nice and scary! But now I want a Quake 1 platformer. With rocket jumping. And Lovecraft.
I loved them as a kid and hated levels without them!
Can't imagine this pixelated better. Fantastic work!
Here it is! Glad you uploaded this one here as well man :)
Love the rendering around the mouth especially, and that palette is Quake-y. 
awesome! those things scared me as a kid!