The use of games in education has demonstrated considerable pedagogical value, particularly for cultivating students’ creativity and critical thinking. Games can create learning environments that encourage active participation, collaboration, and exploration through experimentation. By integrating games into educational settings, students can engage with complex concepts in more experiential and interactive ways, thereby supporting deeper understanding. This paper presents the design and development of DJ Ostomachion, a music-educational software application. Inspired by Archimedes’ Ostomachion, the application simulates one of the oldest known mathematical puzzles while simultaneously functioning as a musical sampler containing pre-recorded sound samples. Each of its fourteen geometric pieces offers eight different audio samples that change according to the position in which the tile is placed. In this way, students can create different visual configurations based on alternative solutions to the Ostomachion while also composing and producing their own music. The application additionally supports recording functions, enabling children to build their own personalised sampler. DJ Ostomachion was designed with primary education in mind. Its aim is to provide a playful, interactive, and enjoyable learning experience while establishing an interdisciplinary connection between mathematics and music. Through game-centred practices, students explore geometric concepts such as symmetry, spatial reasoning, and transformations while developing creativity through musical composition and improvisation. The presentation focuses on ways in which the application can be integrated into both mathematics and music teaching, offering practical strategies for strengthening collaborative learning and problem solving.