Left side of her face is shaded when it shouldn't be, other than that looks fine. I'd tweak the design some though, doesn't quite give me a properly alien vibe. Something notably inhuman like doubled pupils or a strange outcropping of flesh can do it without ruining the cutesy aesthetics of it. Frills are a noted favorite.
i really like it.try to cut down colors and do better clusters as an exercise
Edit, disregard what was originally here.CRITWAYS, have you tried making her hair blobs tentacles? It wouldn't be too hard a conversion and wouldn't sacrifice the design you have, just a few suckers or some shiny spots to imply a slick surface.
Solid improvement on the clusters. Sorry, everyone beat me to the technical stuff so I'm going on design! I'll cut that out now, haha