Weird game


The position after 6. Nxc3 is a textbook example of how not to play the black pieces. After 6 moves all of black's pieces remaining on their starting squares!
So how does black go from this position? By making some useless pawn moves and exposing the undefended rook.
I wonder if 11. Qe5+ and taking the h8 rook might have kept more pressure on the black king. Though the way it was played certainly turned out well.