It's okay. Working with noise creates a large number of colors and there is nothing wrong with that. I advise you to forget about the rules of pixel-art, because it is unnecessary dogmatism, which slows down the development of the pixelart stream. 
9774 colors??!! Dude... I think something might've gone wrong during the export process, cuz I see artifacts on the tent, especially. Unless that's intentional?
Aside from that, I love the atmosphere and I was especially impressed by the smoke haha
"PIXEL ART REQUIRES REVISION!"