On her right hand the base of the thumb is as wide as her wrist, I'd make it a bit smaller. I'd advise against using photoshop to automatically change colours, you'd be better off choosing your colours manually. Having said that, I don't see anything wrong with there being a mix of green in the colours. What kind of lighting is this set in, by the way? If her face is facing downward like that, then I wouldn't have thought it should be shaded like it is judging from the rest of the shading.

Well, the two moons were meant to form the eyes of a face in the sky, the massive personification of terror/fear/anxiety, that's the whole concept of this piece, hence the title; the trees and ufos are really just a by-product of that, they were meant to act as sloping "eyelids" for the moons to reflect the same anxious expression as the running character. I guess that wasn't executed well and was confusing, so I've changed it around a bit now and ditched the concept altogether:

I plan to draw the branches of the trees in the foreground with the same "fading out" lighting as the new tree, I just haven't got round to it yet. I have to fix the palette too. I'm thinking of putting a few multi-coloured illuminous objects around the rest of the trees in the background. Alex, I'll remember to put in highlights on the tree tops from the moonlight, thanks for reminding me.

I just wondered about the lump on her face. I would've thought it should look something like this:

Looks good (and evil, hehe). The level of contrast in the piece kind of makes the details in the 'gawd' hard to see, though. Is that selout on the top of the devil's head? If so, I'm not really sure it is needed on this, as this has an opaque backround which the outline can be purpose drawn for. Also, you could use the two lightest colours on the devil as anti-aliasing on the gawd's edges.