I dig the scribbly outlines. but i wonder if they should be used on the claws as well? you sure don't need them on the head. i wouldn't know if it'd feel more balanced with outlines on the claws until after i'd seen it. could be an awful suggestion for all i know.
kinda reminds me of the Final Fantasy movie's "ghost" aliens.
Looking interesting. I'm not sure if it's any use, and who am I to really judge, but I think if you decreased the length of the abdomen and increased the thickness of the legs a bit it might work better, proportion wise. That's just my opinion though :0) ... the colors are looking cool