Well, first I can say that every chibi I've seen is different, yet alike.
Are the pupil's supposed to be looking down? If so, you may not want to make the pupils "too" low.
Secondly, I think the face is a bit too in the middle, try taking not too much space, but enough space to make her seem more comfortable?
Thirdly, you pay want to extend the face a tiny bit more longer in height.
The hair is cute, the bangs look a bit odd, but that can be fixed pretty easily, like the rest of the drawing.
All I can say is to look at chibis more often, to get a better aspect of them?
Keep practicing, I have faith in youu!!!