16.Kf8 may be better for black, 3.Nc6 seems better for black, and then for example
4.Nxd4 Nxd4 5.Qxd4 Nf6 and black is good.
I don't see any strategic plan in the Anderssen though, b3 seems a more logical move to surprise and not commit oneself in the center, a3 is "almost" like giving your turn.
But then, I don't know this opening so I may give it a try to see by myself...Good game by the way.
This is just one miniture game i won using anderssen opening, even tough 1 a3 seems naive but it has its merits in non grandmaster games.