There is no right or wrong answer when it comes to whether or not Bingo has to be horizontal. Some people might prefer the traditional format, while others may find it more visually appealing to see the numbers side-by-side.
Ultimately, it is up to each individual to decide whether or not they prefer Bingo in a horizontal or vertical format.
Some people might argue that Bingo can be both horizontal and vertical, depending on the game’s layout. There are some games where the numbers are displayed vertically on a board, and others where they are spread out horizontally across the board.
It really depends on the specific game you are playing.
Ultimately, what matters most is that Bingo is a fun and enjoyable game. Whether it is played in a vertical or horizontal format is up to each individual player.