Music can reduce the sense of loneliness experienced by many teenagers, increase their well-being and regulate their emotions. An interdisciplinary research team has teamed up with care teams, young psychiatric inpatients and developers to design Groovy Park, a care game combining music and video games. The game allows players to work together to create music in a variety of forms. Tested in two psychiatric institutions, it encourages creativity, inclusiveness and social interaction. User feedback is intended to enable the prototype to be adjusted with a view to its perennial integration into care practices.