Today's Piano Puzzler

As we head into the Fourth of July holiday, we gave our operators the evening off, so here's a bonus Piano Puzzler.  This bonus contestant (though he may not think of himself that way...)  is William White from Portland, Oregon.  I got the hidden song pretty quickly, though it may not be terribly familiar to everyone, but it's not an unknown song.  As for the composer style, it's one of those I just toss coins in the air and guess -- though as the contestant was analyzing how he came to his guess, his words suggested another composer to me, so I switched moments before he made his guess...and that was it.