The song you selected is in the center of the Cube. Arranged around the selected title, you will find now only songs of the same genre-category, which are similar or have similar attributes. With the category selection you have additionally the possibility of specifying the emphasis of the search result after the chosen genre.
With one click on a song-picture, you can modify your song-selection (the song moves then into the center) and with one click on Play you can hear the song.