This document discusses level design for game modding. It defines level design as the creation of video game levels or locales using a level editor. Level design involves establishing maps, environmental conditions, gameplay areas, static and dynamic elements, and aesthetic details. The document provides instructions for a class exercise where students design a sketch and map for a game mod idea, including world boundaries, player paths, locations, and environmental details. It also outlines requirements for a level design assignment, specifying that students' maps must include features, environments, interactive elements, spawn points, and aesthetic descriptions.