No SBS and I'm too lazy to look at the undescribed sources to try to figure out what you did. I really like the colors, but I think moving the moon more to the right might yield a more interesting diagonal composition, plus more and longer shadows would seem to be in order. The distorted, giant horse head with the unusual human-skull snout strikes me as being too small a portion of the otherwise-essentially-realistic image to convey surrealism (beyond the admittedly strking impact of the strong contrast in the foreground/background coloring) besides being more odd than spooky as required by the contest description IMO. As for the 'deadly fog' in the title, the horizon is crisp and the purple clouds look like dust from the apparently crumbling towers, so I don't see any fog. (BTW what's with the white edge on the top of the towers in hi-res?)

The "purple clouds" is a fog that kills people and reform annimals as u can see by the skull and the big head horse

And don't have critic about something if you are to f*cking lazy to look at the sources