define your lights n shadows for starters. the surrounding cliffs seem to melt into the background and have no real solid structure. perspective seems off as well: the figure in the foreground seems close [her size and focus indicate this] yet the buidlings appear to be further away and surrounded by cliffs, yet is in similar focus as the figure. the blimp is presumed to be high above the city, and yet is also in similar focus and relatively small also. it all runs together and is hard to discern. id suggest clearly defining said issues and separateing each with lighting and focus. - JAG
it's only after you've lost everything, that you're free to do anything..