Okay, so did you do this one yourself completely.

yes, yes I did

Well then, in that case I have some suggestions to make. I do not consider myself an expert as I have no skill in the drawing of anything that has physical anatomy. That may be why I prefer to write stories rather than draw pictures. It is much easier to describe a character with words than present them as a drawing. I normally draw indoor scenes or objects without anything living besides plants involved. With these drawings, I like to pride myself with the level of detail and shading that I include. While I am no good at anatomy, I would suggest that you figure out a good kind of framework to base your character on. Think of it like drawing the skeleton and then adding all the flesh and stuff on top. The picture also seems to lack a good amount of possible texturing, it looks too much like the character was made out of rubber or plastic. It also looks very flat due entirely to a lack of shading. A good way to shade images is to first figure out which geometric shape each body would be akin to. For instance, the shell is very similar to a kind of m&m shape. Once you have decided on the geometric shape, you have to choose which direction the light is coming from. For simplicity sake I would just go with the upper left. Normally, the side of the shape opposite of the light source would be the darkest and would get progressively lighter as it gets closer to the light source. I normally use a very loose method of cross hatching, but for this one I would suggest a basic cell shading. Finally, I have a really hard time figuring out what the background is supposed to be and it looks like it is a mere inch or two behind her. Depending on how for the background is away from the foreground you should dim or fade it depending on the lighting. I wish that my comment didn't sound like a long list of criticisms, or a very downgrading reprimand but I'm not really sure how else to try and help. I'm sure that an example would be very helpful, but as I said before, I am terrible at drawing everything with anatomy.