https://www.domestika.org/en/courses/564-introduction-to-character-design-in-pixel-art

Create characters for video games where the pixel is the star  A pixel is the smallest digital representation of color, and pixel art is a form of digital art that consists in editing images at pixel level to build an "old school" aesthetic like the very first video games.  In this course, learn to reproduce this aesthetic alongside Daniel Benítez, cofounder of the video game studio Fourattic, as he teaches you to master the art of the pixel from scratch to create characters and graphics for latest-generation 2D video games using Pyxel Edit.