This is a cool idea. I tried it out for about half an hour, and enjoyed it. It gets pretty challenging, and you have to know your music pretty well. I found it best to stick to my "4+ Stars" playlist in iTunes, since I have a lot of music in my library that I can't really identify cause I don't hear it often enough.

Amusingly, the first time I played, one of the randomly-picked songs was an experimental electronic one that itself sounds like a mish-mash of songs being played at the same time. That was pretty funny.

I think this game might have a pretty limited appeal, but I'd say give it a whirl. It works for me.