After e4 e5 Nf3, f6 is not such a great move. Nxe5 practically refutes it.
Edit: 4.Qh5+ g6 5.Nxg6 Qxe4+ anything 7.Qxg6
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by the way 2.Nf6 is king's knight game and cannot be called a defence because defences are only black moves in the opening.
Hello Mr. Jules, the Syrians have an urgent message for you:
وسوف تدمر كل مربعات الشطرنج تطير من جمهورية الصين الشعبية من صناد! عاش الملكة الملك "ستاندرد مناورة تراجع
How could they say such things!