Great fun for the first season. I am on my second season of playing but the only way you unlock new songs is by earning cards to open boxes. Each box you open means the next box costs more cards. The problem I that in the second season I have progressed all of my boxes to where it takes 30+ cards to unlock. I ha e progressed to level 16 on the second season and I have unlock 1 new song. Just one. It just continuously gets harder to get new content for players that keep playing.