Pipe-opolis
BA66-0000-002A-4DB2
I always loved world 7 of Mario 3, just the idea of a world so focused on pipes. And it's just a neat aesthetic that's different from most Mario levels, with so much green.
I've also been annoyed at user-created levels using pipes in kind of weird, broken ways...not lining them up well, leaving the back end exposed, etc. So I wanted to make a level that treats pipes right, dammit!
It's not difficult at all, but it's relatively long, so I think it makes sense to keep things on the easy side.
Also I used the maximum number of pipes and vines, so that's why the end opens up into normal cave, but I think that turned out for the better anyway.