Orange

Want to start off by saying I love this piece <img src="e.deviantart.net/emoticons/b/b…" width="15" height="15" alt="" title=" (Big Grin)"/>
Since it's abstract-ish, its rather hard to properly critique it, since I don't know what is done by choice style or what you made a mistake on?
But I guess one thing I can say is that I wish there was more detail in her eyes. Perhaps a little more shadow under her brow would do the trick. Also, her forehead looks flat, so maybe shade it up like a sphere a bit. Her mouth towards the right seems to just disappear too soon. Like, at the angle her face is, you'd see a little more of her lips edge there.
Other than that? She looks super fierce <img src="e.deviantart.net/emoticons/b/b…" width="15" height="15" alt="" title=" (Big Grin)"/> Love it.