Oh my goodness, I recognize this from the archives at the SR oekaki. I scrolled down and saw this as a DD at the bottom of the page, and I was like, hey, I recognize that from so long ago! Beautiful work, and congrats.
When I saw the thumb I thought this was a painting. Then I saw it said "Pixel Art" and I still thought it was a painting. Then I clicked at the thumb and now that I can see the picture in original size... I still can't believe this is pixel art X_X