what excactly is wrong with her torso. Looks like it's made out of taffy. And her hand seems to be backwards. O_o Poorly_drawn tag added. :/

She could put your eye out with that waist.

Her waist broke

The face looks great, but much everything else is rushed.

Wow. Terminal case of silly putty tits.
No wonder her back is so wrecked.

Like seriously. How can the face be so amazingly drawn and the rest be a complete pile of crap?

Really it's a fine piece for the most part. The main problems that I see are her right breast, which is excusable given her pose...
But her stomach area is just...well, Eriance put it best I'd say:

Eriance said:
what excactly is wrong with her torso. Looks like it's made out of taffy. And her hand seems to be backwards. O_o Poorly_drawn tag added. :/