Mussila is a 64 level musicial instrument quiz that starts easy and gets more challenging. The art is original and the musical instruments sound authentic, but the interface is cluttered and confusing. It's hard to know where you are or what you're supposed to do.

In the story, you travel with the Mussila band and participate in jam sessions with musical monsters. You unlock instruments by identifying instruments based on their sounds and by defining rhythms and melodies. You can then use your instruments in a recording studio. Content includes 12 instruments.