Wow, the second image is scarier (I don't know the name of that character, I didn't play Munch's Oddysee).
The last one with the unmasked slig is really good. I don't know if it's me but the head looks me a little big, but maybe it can be because I'm not familiarized with sligs without masks
About the first image, if you can do it in vector format (digital), it can be awesome.