You did a splendid job design wise but as mention before a clean up would make this look a lot better.
This is very well done, but I think people will disagree whether or not this is really pixel art, because it doesn't really show the kind of pixel control that many pixel artists are looking for. It's in the grey zone between pixel art and oekaki. And it has 542 colors, which means there's some definite NPA in there that needs to go away. Most of it is probably around the text.
In my eyes, this needs a lot of clean-up before I'd consider it pixel art. Very well painted though.
amazing colors and design, sloppy pixels