Yay, a cat girl!!
Critique time :O
First off... her left hand (the one she's holding up) the fingers look a bit warped. I like the way you did the skirt though.
Also, I was also thinking that to be proportional to her head her knees should be placed a little lower down. This looks like more of a chibi-style drawing though.
Nice pic, though. Just a note: If the Chinese (or Japanese) character in the lower right corner is to mean "cat" (or, in chinese pinyin, mao), the root of the character looks a bit strange. It's hard to explain, but it looks there is a small line above the horizontal line... *gestures*
Ahhh. Can't explain. I wish I could write it down.
I hope you're doing the second Manga Mission, it'll be cool to see more of your art
~reNI