The music created with it can be played by any MIDI player, and can be shown in standard music notation by programs like
A note's parameters can be shown on-screen when the mouse passes over it. Music can be transposed up or down. Groups of notes can be copied or cut and pasted. Pressing the Delete key deletes a note that the mouse cursor is over. You can insert or delete vertical spaces on the staffs. Key and time signatures can be entered and displayed. You can change instruments for music already created ( including percussion instruments).
A beat is provided (by a selected percussion instrument) when entering music with a keyboard -- either without music showing on the staffs or when adding to music on the staffs after that existing music has finished playing. You can select a chord to enter, and you can see the chord name of selected notes.