Welcome to The Closet of The Inverted Rope Material Exchange Shop; I try to restock it when I can, but do feel free to contribute by adding in rarer crafting materials!
The closet features multiple interactive wooden checklists full of material exchanges and a rope that you push (not pull) through the door to operate. A lizard demonstrates how it works by poking the 'Get Vine, Give Ancient Gem' option, places down an Ancient Gem onto the closet floor, closes the door and then pushes the rope through the door hole. The sound of wood clanking and scuttling fills the closet; once the noises stop, the closet plays a short jingle and the lizard opens the door. They excitedly motion at the Vine that's resting on the closet floor, they pick up the Vine and quickly scoot away for you to try it.