13. d5??
13. Bd3 wins the queen.
Actually, 12. Re1? Lets Black get a rook for the queen. Better:
12. Bd3, winning the queen for a bishop.
As for the Bd6, yes, it got forked, but another reason that rarely happens is bishops are not supposed to be developed where they block in center pawns, keeping the other bishop trapped. The computer I play against does it all the time, though, and still beats me because it only needs its queen and bishop out to destroy my developed position while the rest of its army watches from the 8th rank.
My opinion on this game is that I won because black took his queen out way too early and it just got chase around the board. Also that early fork fucked him up. Anyone have any comments or suggestions about the game and what moves could have been better?