What is the best continuation for White?

Casual 5+2, Greenwood Chess Club
Analysis of Coffey, John (2016) vs. Gusev, Dmitri (1865)

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

(white to move) 1. Nf3 Nc6 2. d4 e6 3. c4 d6 4. Nc3 Nf6 5. e4 e5 6. Bg5 h6 7. Bxf6 gxf6 8. Nd5 f5 9. Bd3 fxe4 10. Bxe4 f5 11. Nxe5 Nxe5 12. dxe5 fxe4 13. Qh5+ Kd7 14. Qg4+ Kc6 15. Qxe4 dxe5 16. O-O-O Qg5+ 17. f4 exf4 18. Nxf4+ Kb6 19. h4 Qf5 20. Nd5+ Ka6 21. Nxc7+ Kb6 22. Nxa8+

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