If we continue with our example of an adventure in the Arctic, we could imagine a whale moving through a maze of icebergs. Your first level of play might be to find a way out for your whale. To do this, we put the whale at the beginning of our level, placing blocks of ice here and there. Finally, you need to know the way out of the first level that will take us to the next level.
To create a level for the player, we must know where to place the obstacles. Since this is a first level, with not much difficulty on battles and actions, we'll use it as tutorial-like level to get used to the game keys. Have you ever thought why almost all games begin the same way? It is almost a requirement, as in real life, that when you get to a new place you need to adapt yourself. You need to acclimatize, and I do not mean to just the cold made in the Arctic region.
Without realizing this, you have created a world, a quiet journey through the Arctic, but it still requires...