It seems that you understand the concept of highlights, which is a start, but now you need to practice basic blending. I like the eyes, the blacklining and the midsection, but the purple could use a lot more work. Keep practicing and you should be a pro in no time :)
The colour choices are nice and vivid - needs more highlights/shading and you could do with thinning your paint, which will help with the shading etc. The purple looks very thick and these figures are very delicate. There are some great articles on this site which may help. Keep up the good work :D