Arne is fantastic. Arne, if you read this, the amount of work you do and the quality of it all is fantastic.
That said! Theorb77, you're using a -really quick- piece of concept art to flesh out into a full and detailed piece of pixel art. Good. Great! The main thing I'd stress, though, is that it's CONCEPT art, not FULLY THOUGHT OUT, CLEAN, AND FINISHED art... which means nothing is set in stone*, and there may be errors, or things that could be improved, in the concept art.
Most notably, the tangent lines that cause the hammerhead to be confused with a foot. What should you do? Whatever you want! Realise the problem, and fix it!
Unfortunately, I've got to go, otherwise I'd carry on typing.
*WARNING: If you're working professionally with someone, and they give you a piece of concept art, don't deviate from it unless they tell you to.