you did good heres one thing one the last move instead of moving the knight take the queen. It check mate.
the killer knight
Looks like you played that well. I don't see any obvious mistakes; your opponent, on the other hand. . . You were pretty effective in spotting those mistakes and exploiting them.
i am new to chess and this is one of my victories. i would like some comments and ways as to wher i should focus and concentrate...