Hello everyone, I've been doing pixel art for quite sometime now but I don't have proper knowledge or background of study regarding it. I've been making games for 7 years now but I'm not really satisfied with the art that I'm doing, it feels like something lacks but I can't seem to describe it well. I want to learn to properly or do the pixel art that I like (I know that everyone has their own styles or how they learn it).

here are some samples of what I've lately made:





Btw what application do you guys use to make one?