well most of it is just basic colors with no shading, anatomy is .. way off, Shade! Change the outline ,to either 1 pixel black, or get id of it, and add a darker color then the thing its outling (white-light grey, grey-dark grey etc.) Other that fixing what you said, well not really fixing but, actualy finishing, they are just like blobs right now, theres not much else to CC Sorry if that seemed harsh, but i'm just giving CC