Two-Dimensional Universe

The Two-Dimensional Universe is a realm that has two dimensions. This means that the dimensions it contains are length and width. So, the shape of a two-dimensional universe is a plane. The only entities that can exist in this realm are dots (zero-dimensional entities), lines (one-dimensional entities), and two-dimensional shapes smaller than the realm itself. These entities can move in infinite directions, but their movement is restricted to the plane. This means that they cannot move vertically. If an entity exists between two other entities in this realm, it is impossible escape from being in between those two entities by moving vertically. Two-dimensional universes are contained within three-dimensional universes.