i like the girl back in the doorway
i realise this is just a WIP, but the one in the foreground is a little wonky yet. her ear looks a little plasticky, and her chin kind of comes straight out of her neck? i realise that the position of her head may just be exaggerated to get the yellingness across, but it just doesn't add up. her entire head needs to be set forward and her neck lengthened some. the jaw line is also a little brief.

(alternately, this jaw line is a little more anatomically correct, i think:

but on a personal level i like the other one? that's your call, though, of course.)
PS
there's something you're doing with little spots of white in the skin that is really cool. it's a little like salt-resist in watercolours.
PPS
probably just because of the hat, this is what those girls remind me of:
http://www.moderntales.com/comics/desertpeach.php(this link is not worksafe, by the way. but it's neat.)