Welcome to pixeljoint!
Well, the first thing that comes to mind when I see this piece is... "what is it?" I am afraid, the readability is a little off. But, hey, my avatar isn't that readable, either, so I won't be overly critical ;p
I like your moon piece from last week. But the most important thing to remember is to keep practicing. The more you practice and participate in the community, the better you become as an artist and the more fun you have.
hehhehe Idk what this is exactly, I was playing with the three colors and seeing what I could make out of it. It is pretty unrefined but at my skill level I would call it done. I don't like working on a piece to long because I feel sometimes I am making it look worse.
Anyways I am a portrait artist (sketch) and I found pixel art 2 years ago, I am not exactly new :3 some of the pixel rules I am pretty slack on. My worst is noise but I get by. Thanks.
(this was originally going to be a hippo but... it was lost in the cartoony approach I took into drawing him.