I haven't seen this before. It's interesting to see all of that beta music actually being used. I know those orgs have been available to listen to for years, but it's really cool to actually see them in gameplay. It's also fascinating to see just how many areas ended up looking quite similar in the final product, like the sandzone and the waterway, and how very similar music was used. When I heard that Pixel re-worked the whole thing after the original beta version, I assumed it was a little bit more drastic, but I guess it makes sense that he would have still kept a lot of the elements from his original design.