/o/ - Art / Oekaki

Hello, I'm pretty new to pixel art, I've done sprites but that's basically it. I attempted a bust, I want to go for a PC98 type of pixel-ing, so the colors are according and I "tried"

Any constructive criticism to help me improve would be much appreciated. I am working on a game currently but not of this style, but in the future once my pixels have improved I would love to try my hand at a different style of game