Help analysing this game

I played this blitz game recently(10 min per side).

If you like, you can ask about the particular move, and i would be happy to tell you how i would have played in that position.

Instead of 61. ....Rgg1, winning was 61. ...R:f1 + ! 62. K:f1 Rg1+ and you get to promote. (In other words, he has to give the Rook.)

It must have been a pretty interesting game or I wouldn't have gotten to move 61 :).

Thanks Atos and Paul,wonderful insights there.

By playing 12...Ng4 I was trying to avoid the exchange and avoid disrupting my kingside pawn structure.That I could not achieve since knight was chased back to h6 and white could have easily doubled my pawns.

Odessian,what should I have played on 12th move?

Thanks!