Music Line 2. Music Line is back in the 2nd edition with snowy Christmas theme. Will you be able to have enough skill and reaction time to beat all 6 levels and 12 cubes you can purchase? Now it’s the Christmas version, it contains 6 levels and 12 cubes you can purchase. Music Line Christmas has day and night mode. This game is one of the action games. Enjoy and have fun in playing this free online action game on Round Games. Good luck. Make sure to check out This Game. You may enjoy playing it.