Hmmm.. Confusing.. Was the ornament suppose to cover the face?
Anyways.. Try to fix the shape, it doesn't look much of a sphere. After that, make the shading as a round ball, just Google "Pixel sphere" and you'll see how they do it. Use wiser color choices, too. AA, too!
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Fix the side views, I am digging the front view!
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Looks too flat, fix the shading of the red part. Try to make the ball more appealing in the middle of the red. Expand the round on the top. Too small, try to make the hat a little bit bigger.