What is the strongest continuation for Black?

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

1 2 3 4 5 6 7 8 h g f e d c b a 0

(black to move) 1. Nc3 d5 2. Nf3 d4 3. Ne4 e5 4. d3 f5 5. Ng3 Nc6 6. e3 dxe3 7. fxe3 Bd6 8. Nd2 Nf6 9. Nc4 O-O 10. h3 e4 11. Nxd6 Qxd6 12. Ne2 Nh5 13. d4 Ng3 14. Rg1 Be6 15. Nf4 Bf7 16. Kf2 Nxf1 17. Rxf1 g5 18. Ne2 Bh5 19. d5 Rad8 20. Kg1 Qc5 21. Qe1 Bxe2 22. Qxe2 Rxd5 23. b3 f4

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