— An educational game is a recreational activity designed to teach people (typically children) about a certain subject, or to help them learn a skill as they play. These games are usually successful in capturing pupils’ interest but sometimes fail to trigger learning. This paper briefly explains MITO, an educational game to teach Spanish orthography. The game is evaluated and authors look at the implications of the results of this evaluation in the design of SAMO, a second version of the same game which tries to overcome the main deficiencies identified in the evaluation process.