Books & Undeads is a videogame created with the objective of combine most of the knowledge acquired during the master's degree of Diseño y desarrollo de videojuegos. In this context, a 2D videogame was developed using the Unity game engine. Bitbucket was used for version control. The videogame is a simplified approximation to the metroidvania genre. Most of the effort of the project was focused on following game design guidelines to make a coherent difficult progression and a transparent learning of new mechanics for the player.