looking for critique for future images

[beetlejuice]

hey guys, long time reader, first time typer to these forums, so hopefully im in the right place!

here is one of my newer images that i posted a few days ago and was hoping i could get some critique on this for next time i draw an image similar to this, listing what techniques i could use and how would i apply them.

here is the image of a rejected angel throw back from the heavens.