World 1 of the greatest 2D Mario experience you can have outside of the hacks Mario Adventure and Super Demo World: The Legend Continues, in my opinion (I'll do recordings of both later): Grass Land. I think I did pretty well in this video.
I ended up deleting both videos that were up earlier and starting the whole series over again because I really didn't like how I performed. It seemed like I did worse than usual... I'm pleased with the way this one and the next turned out.