This document discusses the key elements that game designers consider when developing a game, including narrative design, character design, level/environment design, gameplay/game mechanics design, and user interface design. It provides examples for each element, such as narrative focusing on the story and characters, character design covering the main character and other actors, level design setting challenges through the background and map, and gameplay determining the type of challenges, activities, and rules. The document encourages analyzing these elements in existing games and applying what is learned to starting to design your own game.