Her face is very cute, she looks so happy. The soft shading of the eyes makes them stand out and look extra good next to the textured fabric. I also like her subtle blush.
I also like the green and blue colors. The shading looks very nice on the hair.

I like how you did her hair, it looks so soft~

Amazing colors. The bright colors go well together, and really pop against the more subdued green background. Great stylization on the bullets, too. Love her smile, as well, it has a slight sense of "mystery" to it~