What's style to be used for final result? Paint? Pixel art?
Size is quite big. Can you not reduce it?
Is the dragon flying? If so, he's in a seated pose. If flying, his tale ought to be extended out, moving in a sin wave motion.
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EDIT:
Alrighty, well you removed your image from your post. If you're revising it, never do that. Leave each progress step intact, and just post new stuff while leaving the old alone. Otay?