Treballs Finals de Grau d'Enginyeria Informàtica, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2017, Director: Anna Puig PuigWorldEditor for Fracsland is an application that allows to extend the game of Fracsland. Fracsland is a Serious Game in development that allows you to learn the concept of fractions in a fun and enjoyable way using a game. Serious Games are games developed mainly to teach a concept or idea, through a video game to make it more fun and enjoyable. In this case, it consists of the player learning mathematical concepts focused on upper elementary school students. Most games usually have a reduced game life, since once important events of the game are completed, the player usually stops playing because he tires to continue playing. The application developed in this project has been developed using the graphic engine Unity 5, which allows to extend the game of Fracsland without needing to have technical knowledge, through the creation of new scenarios and challenges, allowing to play with this scenario In the original game.