You have to buy (with real money not anything earned in the game) songs to play unlimited for a specific amount of time, if you done you have to wait for "boxes" to open for you, even having to wait to replay already played and beat songs. The game could be fun to aside from the typical money making scheme. I understand they want to make money but make a set price for the app with a certain amount of free songs you u can play unlimited! With no waiting! REDICULOUS. I HATE WHEN APPS DO THIS!