Resignation after 14 Moves

In a game of speed chess my opponent resigned after only 14 moves. He was  Tlep222 from the Vatican, who played black. Here are the moves of the game along with my commentary:

1. e4 e5
2. f4 Bc5

The moves exf and d6 are more common for black.

3. Nf3 exf
4. d4 Bb6

Black has to retreat the bishop at the expense of the development of his pieces.

5. Bxf4 Qf6

The black queen attacks my bishop, but this move is premature. A developing move such as Nf6 is preferable.

6. Be3 Nc6
7. c3 Nge7
8. Bc4 d6
9. 0-0 0-0
10. Ng4 Qg6

Black must move the queen, but the f7 square is vulnerable.

11. Nxf7 Rxf7
12. Bxf7+ Qxf7

Black must lose his queen.

13. Rxf7 Kxf7
14. Qh5+

In this difficult position black decides to resign. He plays aggressively, but questionable moves such as Bc5 and Qf6 worsen his position. This leads to his quick resignation.