What is the best continuation for White?

Casual Game, https://itsyourturn.com
Analysis of John Coffey vs. Nicola

8 7 6 5 4 3 2 1 a b c d e f g h +4

(white to move) 1. Nf3 d5 2. d4 Bf5 3. c4 dxc4 4. e3 Nc6 5. d5 Nb4 6. Qa4+ c6 7. Qxb4 Bc2 8. Qxb7 Qb8 9. dxc6 Qd8 10. Bd3 Rb8 11. Qxa7 Ra8 12. Qd7+ Qxd7 13. cxd7+ Kxd7 14. Bxc2

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Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight