
I noticed you need to do some work on the tower, mountain, and moon borders. For the low res that this is there are a lot of details that should be tended to. For example, the moon has sky colors on it(along the edges). It looks like some spill over anti-aliasing.
By the way, the above should be pixel perfect. Just paste it over the old, also use it as a border to extract the mountain, tower, and moon!
later,
-junc