My game vs Duke of Wellington (Chessworld)

I thought this was the best I've played for quite some time online, the opening is standard Ruy Lopez theory. During the middlegame, I felt that I was always in control and had the initiative and once the simplification was over had a reasonable position going into the endgame. I spotted the mating possibilities early, unfortunately for the Duke, he did not.

Feel free to disagree and suggest better moves, I won't be offended.