Im sorry.. I don't understand.
Do you mean my opponent didn't play the expected reaction to my opening of e4/kf3/c3?
My understanding is that the Ponziani was these 3 beginning moves followed by the appropriate 'line' depending on the enemies moves. Does my opponents moves change my play, I thought that would just require a different line.
Perhapse when he moved Nc3 i should have did a different strategy? Which would you suggest there?
Ponziani opening traps

This variation indeed leads to a drawish endgame, though there is some room for both sides to win...
But all this is not forced and white can deviate earlier with 7.Nxg6 and other moves.
I played against someone who played 7. Nxg6 and I won. After 7... hxg6 the h file gets opened and it can get annoying sometimes
@pfren your recommended move exd4 instead of Nxe4 looks interesting

Here is a line in the Ponziani which has been declared a draw. Maybe so but a strong player can play for a win:

Thank you pfren--you are correct i posted wrongly and you also caught my mistake. Here was the final position:
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