Responsibilities include developing and designing gameplay, mechanics, characters, and plots for casual games. Creating detailed documentation, including game design documents (GDD), character descriptions, levels, and game mechanics. Conducting market and competitor analysis to identify trends and audience needs. Collaborating with artists, programmers, and other team members to bring game ideas to life. Creating tasks for the team, decomposing game design documentation, and planning the release of features. Testing and balancing games to ensure high quality and player satisfaction. Participating in the development of a marketing strategy and game presentations.