Today's Piano Puzzler

This week's contestant is William Beyer from Des Moines, Iowa.  The hidden song is extremely easy, and most people should not only get it, but get it quickly.  The composer style though is one of those where I can throw a dart among several people and hope for the best.  In fact, the contestant, who from his analysis of musical styles was clearly very knowledge, and he had a great deal of difficulty, though eventually got it (albeit it with a a few descriptive clues).  So, I took a total guess to the one I thought it might be closest to -- and was wrong.