Well, and this isn't supposed to be harsh, mind you-
Girl on left- Personally, this generic anime style is a little too...how to put it... abundant. That isn't to say this drawing is bad, but I personally would love to see you develop a more individualized way of portraying your characters. Actually, that point applies to the entire work.
However, to me it looks as though her neck is too skinny to be that long, but she's a pretty skinny girl anyways, so that's more of a personal preference than a legitimate critique.
The only technical problem i can spot is that the second (rightmost) girl's legs are waaay too short. The upper part of her legs, which are horizontal, should extend out more, thusly decreasing the inward angle of the leg bend to have the foot end up in the same position as it is now.
The hands are probably one of the most amazing aspects of this, and that is, believe it or not, saying alot, as hands are one of the most difficult things to draw in any style (except maybe chibi
)
I'll also suggest that you use the floral pattern you obtained as a
reference for your own patterning, as it'll undoubtedly fit the pleats on the skirt better if you draw it yourself.