The Grassy Pipes is a world accesible from the control panel in Lightbulb World.
Features
This strange world is comprised of clusters of golden pipes with grass growing on them, floating in space. There are strange red creatures walking around, as well as floating hats. There is also a purple orb that can be found that turns yellow when interacted with.
The upperleft-most platform has two notable things, the first being a doorway leading to a path surrounded by clouds with an android named Quare tossing a ball. Interacting with them will display a fullscreen image of their face. The other notable thing is a huge pipe with a moon-shaped character peeking out, who will not let you in unless the aforementioned orb has been switched to yellow. Once this has been done, the moon will lift Totsutsuki into the pipe. A short cutscene will play of Totsutsuki walking, carrying the moon in her arms. Eventually she will arrive at the Astral Ruins.
Directions
Totsutsuki's Nexus → Lightbulb World → Grassy Pipes
Gallery
The entrance to the Astral Ruins.