It's a game.

It's a roguelike.

It means you have to collect stuff or make it to help you survive.

The whole World in the game is dynamically created in realtime. The World map, is infinite in east and west, and North and South directions.

It's randomly generated every time you as a player start a new game.

The World exists without you. You are part of a living World, and can just Watch it if you want.