It is a well pixelled piece, but unfortunately it doesn't follow the palette limitation of the challenge. You haven't used the suggested Minecraft 64 palette. I cannot let it in to the challenge, because it would be unfair to all the challengers who followed the rules. But it is perfectly fine for the PJ gallery. Please don't discourage in future challenges, because your piece is great. But pay attention to the rules, especially the last part about the limitations. And try as much as possible to post early, so mods can spot problems if any and give you a hint before the deadline.
Ooops you're right
anyway thanks for the feedback!!!