hehe. :P rawr

Since i draw allot of shit which i put into videogames, i will offer some pointers that might help you out.

You got a good thing going with the shoulders, the arms just need to be a little thicker, your sketch looks like you were pretty tensed up while drawing it, this happens allot and can make drawing fluidly hard.

The size of the drawing looks like it's 5cm by 10cm if you draw a really large picture it is much easier, and less cramping, the navel is allways about half a foot from the groin.

breasts are allright, stylised of course but that doesn't matter thighs look a little exagerated but that depends on whether you want to convey that or not.

Allways remember to keep practising, and not try to make a perfect picture, just sketch and sketch and use light strokes making vague shapes, and then refining them with more firmer strokes of the pencil.
Anyway seeya on facebook.