err, comfy, this is a reallly good piece, but i dont think you understand what the weekly challenge is, since you have submitted 2 pieces to it that dont follow the guidelines. The weekly challenge is where every week pixeljoint releases a theme and a set of rules, you have to follow those rules, they will almost always give you a limited color pallette, and will normally give you a rather reasonable canvas size. This weeks weekly challenge is titled "dog portrait", its where you make a portrait of a dog, the canvas size is a max of 80x80, and you have to use at max 12 colors
It's sad because her pixel art is pretty good