I created all of the pixel art using Aseprite. I downloaded it from Steam and it's perfect for creating pixel art and especially pixel animations. My gif logo took me a few hours to get started but it's super simple to use and loads of fun! I also used a free online drawing editor called Pixilart to make some of my other pixel art works.
https://www.aseprite.org/
https://www.pixilart.com/draw
