Quite ok for a first lowpoly modeling attempt.
Some tips and thoughts though;
-If you're aiming to get her ingame, you'll need to triple the polygons, all the game engines out there handle 3 point polygons only.
-You might want to put some more geometry in to the knees and arms to prevent them from deforming too badly when animated.
-Some proportions are a bit off, most notably the arms are a bit too short
Also check out Polycount (http://www.planetquake.com/polycount) and it's messageboards for everything lowpoly related, if you haven't already.
Just a figment of my imagination.