Bemani style

Recently SquareX, my close friend, has influenced me into getting into the arcade game Beat Mania. For those of you who don't know what that is, it's an arcade game where your role becomes a DJ mixer, and you have to scratch and press different keys at the right time according to what song you're playing. It has got to be one of the hardest music based games I have ever played. No matter how much I practice, I can only do Light 7, level 3 at most. I've only been playing for 3 weeks so far, so I guess that's normal. Anyway, more or less, it became one of my favourites, amongst Pop'n'music, DDR, and Guitaur Freaks. Can't wait till I can start doing some normal 7 songs...

Enough of that, and onto the picture, I know her left arm looks really ... off, I can't quite put my finger on it, so if anyone could tell me what I did wrong, and how to fix that, it'd be great. and forgive my sketchyness, but I'm feeling just to lazy to erase those lines for now. Critique is encouraged, but please, none of that "you did this wrong, and that wrong, and that looks all messed up. ok bye" kinda stuff, I want to know what's wrong, and how to fix it too! If I don't get any good suggestions like that, I'll never get better! Oh yeah, and feel free to critique my fashion sense too, I know I have a really horrible fashion sense, and it wouldn't hurt to get suggestions on what kind of clothing to put on my characters.