Fun! A bit crazy in terms of collage clutter, but very iconic in pose, that's for sure!

Don't forget to add a few more moons into the picture, if it's about the "moons", you know!

And watch out with the placements of those bursts of fire, hehehehehe...heheh...to avoid flatulent revelations, hehehe!

To reduce clutter and overall flatness, consider the distribution of contrast! Right now everything is heavily detailed and contrasty, taking away focus and depth. Needless to mention the complete absence of cohesion or connection between the elements. Light should be managed. On a big scene such as this I would recommend making virtually all lights based on visible light sources except maybe the sun, which would provide consistent lighting over all. Provide clarity and a sense of permeating logic with lighting, colors and placement of both. Consider a sense of atmosphere, which does not have to come for haze, but simply color/air perspective, roughly speaking it would simple reduce the saturation of things in the distance (progressively), while saturating things in the foreground!
Manage the contrast! I would never place heavy contrasts on detailed image pieces smack across a frame, because you couldn't observe anything that way. Have contrast where you want the weight of your image to sit. Consider offering a path for the eyes of the observer to follow across your painting! Normally you never look at something horizontally from left to right. You commonly wonder around in some scanning pattern. Offer a pattern/path along which one would scan! Contrast, value and color help this path and can totally lead into depth, meaning it can very well fade into lesser contrast for the sake of depth perception, but the eye will follow it. Your flying ships would be perfect for that!
Needless to mention the curves of that heroin, of course!

Anyway, just felt like writing you something.
