girl with guns

So far, I believe this is the best character design I came up with. See anything gone really wrong with the picture? Take a look at her left foot, I was concentrating so hard that when I got to that part, I forgot that her feet were supposed switched, thus her left foot looks like a right foot. The original sketch has been fixed because I noticed it saw the mistake after I scanned it. I'm too lazy to rescan it, sorry. as you can see, I'm still having a helluva time working on shoes... why do i find it so hard to draw?? I dunno, maybe you guys can give me some pointers.