This is really nice, Xion. I'm especially digging what's going on with the purple, the stars and the whole tree base thing.
Now, I'm not sure what style you're going for here exactly, so keep in mind that these points may be null. That said, I think the face could go for a bit of tweaking anatomy wise. Thus, a quick and dirty edit:

I'm not exactly sure what I did to it, but I think a big part of it had to do with the forehead/nose. They just seemed way too large in comparison to the jaw/chin. Either that, or the chin was too small

Anyway, I basically just squashed the face a bit, vertically, and shaved a little off the tip of the nose. Like I said, if the face (as you currently have it) was a stylistic thing, just ignore this.
Sweet stuff, regardless. Keep at it.
