A game is based on modules. Click on the names of the modules to see how they work, what their content is and what the teacher (on the teachers’ page) can set up:

tones (recognizing the basic musical principles high/low, long/short and hard/soft by ear)
instruments (recognizing by ear)
note reading (recognize notes on staff)
rhythm (rhythmic dictation)
Intervals (recognize by ear)
chords (recognize by ear)
scales (recognize by ear)
melody (melodic dictation; placing notes on the right pitch)
quiz (teacher’s own questions, possibly with image and sound/YouTube movies)
styles (recognize by ear)
theory (answer question)
effects (recognizing by ear)
bar (recognizing time signatures by ear)