I really love the vibrant, beautiful colors in this piece. The bright orange frame contrasts nicely with the green leaves, which are shaded very well. I love the mushrooms--they're a very cool background. Overall I'd say the coloring and composition are perfect, but the girl herself seems to have something slightly off with her face--I think it's a little wide, and her nose is rather rectangular, without much bend or point to it at all. I think her eyes might be rather small--but then again, I'm into anime and Victorian-Pre-Raphaelite art, where everyone has rather large eyes, so it might be my own taste creeping through rather than real critique.
Overall this is quite a lovely picture. I'll have to check out the rest of your gallery now!
Ooo I like this! Great choice of colors. ^_^!