Okie dokie, I'm am winging this, because I've really delt with the critique of art of this nature. Very creative. Have you been taking, or have you taken, a class/course to help you with this? What programs are involved? Do you actually take the photos yourself and then blend/layer them? I really like your work, especially the celestial ones.
I really like the idea of the sillouhete of the trees in front of the moon images. The blending of the colors are great. I really like this.
I love the texture you used for the moon.. it has such a sparkle.. it looks rich with mineral deposits. It looks great as a backdrop to the silhouettes of the trees. And the color contrasts are beautiful. Another wonderful transition.