King's Gambit declined. So much for lightning fast.
3. Ng1f3 Ng8f6 4. Nb1c3 Bc8g4
Pressure on the e-pawns, this bishop indirectly protects e5.
5. Bf1c4
Prepares a new target at f7, making it urgent for black to castle.
5... h6
There are urgent things to do and no time for this. Nc6 or Be7 would've been better.
6. O-O Qd8e7
There are light officers to develop. This blocks the route from the f8 bishop and thus prevents kingside castling which would give the f-pawn an extra defender.
7. fxe5
a bit premature, but hastens to go for f7.
7... dxe5 8. d4
Opens the line for the queen's bishop, goes for the center, and prepares Nxe5 for added firepower on f7.
8... Nb8d7
Good move.
9. Nc3d5 Nf6xd5 10. Bc4xd5
Route cleared to f7, attack on b7 an unexpected bonus.