Looks good, though the animation frames look too stiff, specifically the walking and sword swinging animations. For the former, there's little difference between him just standing and him making the walking movements, there's little emphasis on the movement, he just sort of moves his arms and feet a little. I'd suggest doing something like in the first image below. As for the latter, you should make Link lean a bit more forward, and the other arm should be moved back, like in the second image below.
The items looks kind of ugly and stray far from the NES stylings. They DO only have three colours per sprite, which is true of the graphics from that era, but they all use different colours, which is very inconsistant. I would suggest that you create a set palette for yourself; four sets of three colours (plus one transparent one) for link and for all of your items. And make sure to add more detail next time, every one of them sans the rupees look too bare.
Your formatting could also use some work. You have your sprites themselves well organized, but there's too much blank space that could easily be cut down. Also, don't use bright purple for brackgrounds. I understand why you most likely did it, you wanted to use a colour that you wouldn't be using for your actual sprites, but it's really bright and hurts to look at for too long. Try using dark green or dark cyan next time. I prefer dark green myself.
Also, I've noticed in the description on your DA account that these were inspired by several different sprites. I would advise against doing that, as each one has a different way of doing things, and trying to do all of them at the same time can be very messy. Not to say that these look at all bad, but there are many places where the styles don't gel well and look very rough and awkward.
Still, thery're pretty nice overall, and I would absolutely love to see you fix these up a bit and submit them here. Keep up the great work!