Following text has been copied from the .flow wiki's page Famicom World.

The Famicom World is an area that is stylized to look like a retro game, and even Sabitsuki's appearance changes graphically in this place. This world is home of the Broom and Television effect is located deep inside this world.

By interacting with a grate in the Static Noise area of the Cloud World, or by interacting the broken glass pieces in the Blue Electric World, the player can reach this area

In the former case, the player appears on a path leading to the Witch's house.

The latter one leads to the Warp (ワープ) area. It is impossible to go back to the Blue Electric World from here.

The Witch's house is located in a forest. By entering, the player can interact with the Witch to get the Broom effect, but there is another POI outside.

It is possible to go into the forest, where the path seems to branch off to the south. There is a well, which is usually empty, but a Kaibutsu may appear here under certain conditions if a shared event variable is above 70 points (the number of which also triggers the jelly in the Apartments) and has to provoking any passive Kaibutsu except for the one in the Blood Maze. This Well Kaibutsu slowly moves toward the player and traps them on touch.

Though hard to pick up on, there is a path that leads from the Witch's house into the main area of the Famicon World, which is an island. While it has nothing to interact with and has no events, it'll lead to several other rooms.

By continuing on the path from the Witch's house, the player will arrive to a set of gray patches which leads to the Machine Nation World (機械民族). There is another set of gray patches on the south, which will lead to the Warp area. By following the path to the very end of this island, the player will arrive to the ? area. There is nothing to do in the Warp and ? rooms, but the aforementioned contains the Television effect and a little event.