Hypnospace Productivity Lesson #1 - Make your graphics look like crusty old web graphics.
going for style more than accuracy here but yeah. there'll likely be a part 2 to this one because I forgot about few tricks :0) sorry about saying "uh" so much.
Hypnospace Productivity Suite: https://jay-tholen.itch.io/hsps
Aseprite: https://www.aseprite.org/download/
GIMP: https://www.gimp.org/downloads/