This reminds me a bit of the game Scratches and the creepy guys that walk around.
Technically, I'd say the lighting is good but the painting style needs a little but more. At current time he kind of looks... paper mache with some fuzzy hair here and there. I'm not negative but I'm not really drawn in to it. The mouth is where I see the most promise.
For something quick and 'concept-y' it's definitely the start to a creepy creature design.