Why does that one character have a case of Raptor Arms? It could just be a joke or a poorly communicated design but someone might think you're making fun of people with autism.
I'd also avoid baking characters down to a few short phrases and descriptors. If you can do that you're most of the way to a Flandersized character.
I'd also research drawing hands and feet. Absolutely nothing to be ashamed about, hands and feet are probably the common hurdle young artists have to contend with. And it's always a contradiction when you're not aiming for photo-realism because your art style is supposed to simplify and streamline the human form, yet the only thing that might be more detailed and complex than a person's hands or feet is their face.
Also can't help but feel like wearing a shirt that exposes your midriff with a jacket over it is the 'socks with sandals' of women?