Very neat blog post, Alex! I played potions and liked the game. I tried to re-create the shader myself, and wrote about it in this blog post.
Later, I found out about this write-up, and have now included a link to this in my blog.
Great work :)
Nice walkthrough. The sin Wave distortion turned out really good! I think it suits the pixel art style a bit better then the simplex noise displacement filter.
