Still another silly Internet game

Black in this blitz game played the dubious Symmetrical or Austrian Variation against the Queen's Gambit (1.d4 d5 2.c4 c5?!). My 5.Nc3! is a well-known trick leading to a White advantage after either 5...Qa5 6.Nxd4 or, as played, 5...Qd8 6.Qxd4, heading for a favorable ending. Black's 7...a6? is a known blunder, allowing the very strong 8.Nd5! At move 10, possibly even stronger was 10.Be3, when Hook-Marumo, Novi Sad ol 1990 continued 10...e5 11.Nc2 Bf5 12.O-O-O+ Ke8 13.Nd5 b6 14.Bxb6, winning a pawn for starters. In my game, Black's 11...Nxb6?? gave me a choice of amusing mates.