If I could add anything..
I would add a type of Genre button. Simply put, by default the option would be, random, thus anything being played next would be, random. However, say I wanted to listen to only Jazz, or let's go with Video Game, it would be really nice to have a button or option to be only listening to, even if it's random, to that of the Genre you want to hear.
It would be like tuning your radio station to a Rock Station, because all you want to hear is Rock Music.
Still, as is, it's pretty good. 8/10