In the present paper a system architecture for the combination, interaction and synchronization between different technologies is presented. Our system integrates 3D interactive virtual environments, 2D animations and games, avatars, form applications and documents, videos based in Chroma Key technology and other multimedia components. All of this inside a unique web application with a special objective, developing an interactive game for people who would like to become a self-employed worker. As the legal procedure (focused in the Spanish model) to start to be a sole trader is difficult and hard, we have developed a very intuitive, easy to use and enjoyable game to cover all information needed by these collective of people. The authors describe all the components of the architecture, the technologies used for developing each module and the combination and interaction between them to finally obtain this interactive game integrated inside a web application.