Well, I don't have the analytic skills of my fellow posters, but I just wanted to say I thought it was really creative. Maybe a computer would have crushed you for it, but I sure wouldn't have!
unless, of course, I didn't miss the mate in 2;)--which I did until I looked at it again after seeing the analysis
Knights Rule!
As promised, the last of the three with a nice double knight (with rook assist) mate:
9. O-O? is just an error, I guess. It pretty clearly loses a pawn, so nice job exploiting that. 10. Rxf3?? Is terrible; after the exchange, he loses a rook for a knight after 12. ... Nxf3 or a rook and a bishop after 12. Rany? Nxc3. Of course, 12. Rc3?? Nxe2 is completely losing.
15. and 16. are literally asking to get mated, exposing his king instead of developing his rook. I don't think he had much hope either way, so maybe he's just cutting his suffering short. 16. ... h5 is a nice move, trying to force an open a file. 19. Kxh4 earns like fourteen question marks.
The mate was nice, but I think where white really lost was after 10. Rxf3. He was not only down a rook in the endgame, he was totally exposed. He's not so bad off after 10. d5, I don't think. Actually, Rybka recommends 10. e5 Bxe5 11. Bxf3, interestingly. It appears to lose two pawns, but after 11. ... exd4? 12. Bxc6! Qxc6 13. Qxd4 Nf6 and white is fine, or even better, 12. Bd5 Qg5 13. Bxf7 and white is on the attack and in a decent position. He quickly wins back the lost pawn.