In the field of music education, harmony represents an important learning challenge, especially for unmotivated students. This obstacle suggests the need for facilitating digital tools. Educational videogames are presented as effective strategies for teaching complex content. This lack of resources is accentuated in university education. In 2020, a multiplayer board game named "Tone Cluster" was developed as a tool for learning musical harmony, with graphic interfaces designed for a future mobile version. This research proposes a digital redesign of the game and interfaces, followed by its implementation and the evaluation of its usability on mobile devices. The application allows for asynchronous games that are accessible anywhere, taking advantage of the versatility of mobile devices. Evaluations with experts and users highlighted the quality and effectiveness of the game in terms of usability, with mostly positive results supporting its potential as a music teaching tool.