All it needs is a voice....
And a save button, though its a great game of creativity difficulty needs to be upgraded while playing the songs. Also as I said a game like this could really use an obvious save button just in case people want to save their great songs if it were not for these I would give it a perfect 10. I would give a seven, but I had fun so I'm going to give it an 8/10.
So keep rock'in Punk-o-matic!