Episode 112 starts inside the back tower on Basket Castle, where a solid floor is already down and the stairs are going in. From there the work moves into the wall itself. Basket is the only player in the game; the in-game chat shows only the server's sleep and weather menu.
Stairs in the back tower
Basket lines up the window pattern on one side, the top half of a block with a slab underneath, and leaves the other side open for now, since a second floor might run that way later. "So this way isn't one you can actually look out from this room, but it's okay." The rest of the floor goes in. The floors above have a pillar coming up through them, so Basket carries the same pillar down through this room and bends the stairs around it, shifting them over as they climb. "Maybe. We'll see." Some lighting goes in, though what it will be in the end isn't settled yet.
A path through the wall
Next, Basket wants a path that carries on across to the other tower. A quick trip outside checks that a second row of windows wouldn't sit too close to the first. It wouldn't: "I think that would look good." Stone or wood? "I think wood." The walls stay stone and the path goes in as birch, starting with a line that marks off the tower from the passage. A path up to the top could come later too: "That might be a good idea." Torches go down "for the meantime."
Windows all the way across
The window holes were dug out earlier. Half as many might do, but they're already there, so they all get filled, which takes another round of crafting slabs and a lot of stairs. One goes in wrong. "Nope. Try again. If only installing real windows was this easy."
Then a look from outside. The windows could be spaced further apart, but a viewer likes them the way they are, and so does Basket: "I think it looks pretty good."
A second level
So a second layer goes in below the first, a smaller tunnel with its own floor. That means a change in height and a more gradual step through the middle part. The floor is birch again, with more slabs, and torches go in "just so we don't have surprises." The lighting glitches down there are "weird." Then Basket digs out the wall for that level's windows and fills them the same way.
Stairs between the levels
Two sets of stairs join the levels, one at each side, each starting just past the first window. One version turns out to be "a little bit too much of a low bridge," another spot gets "screwed up," and both get fixed, with one step moved over a block. "So now I have a little bit of extra ways to get around."
A last trip down the hill to look at the wall settles it: "yep, I like it." There won't be any more layers. The stream ends there, short, before Basket can start on the tower itself, and the credits run to the end with no gameplay after them.