You've got a silly-big number of colours in there, most of which are indistinguishable and suggests some NPA goings on or at the very least reckless colour management. An image such as this (pretty much monochromatic) should really have no need for more than 16.
The sky and castle look pretty good, but needs AA, particularly the edges of the moon and the silhouette of the bird. The wolf's head looks wrong, the muzzle just runs strait to the top of the head without interruption. I'd recommend looking at a reference for this.
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