The pose looks good, there's a subtle lack of balance to it that feels creepy.
Your sprites look very flat, so they don't read well. I think if you give the sprite some volume, it'll read more like its intended, creepy shape.
Use the highlights more sparingly. Get the form looking good without them, then add a few highlights to add some extra volume/clarity. Right now it looks like you're placing them randomly.
Here's an edit of the largest sprite focusing on the major forms, with fairly minimal details:
I also added an outline to most of it, which helps it stand out from the background.