My Sixth Chess Tournament, Game 3 (A Fierce French Initiative)

I somehow managed to win another game against someone who was rated much higher than I am, and with the Black pieces. In fact, this game was an easier win for me and a shorter game than what I had played the week before. The main reason for why I had won this game was because of one blunder that my opponent made in the opening which allowed me to achieve a strong initiative. I knew I was winning once I won a large amount of material and kept my opponent's king in the center by preventing him from castling. It wasn't too long before he resigned. Here's the game: