Looking for your thoughts

I felt that I have played better than my opponent for the majority of the game , and clearly had the upper hand at the end , however I blundered and should have lost but got a draw . Love to hear your comments , and how I could improve in general when there is no clear tactics on board . Cheers

After 5...b5, the main line is 6 Bf1.

A recent GM game in this variation is:

[Event "ETCC"]
[Site "Crete GRE"]
[Date "2007.10.31"]
[Round "4"]
[White "Vallejo Pons, F."]
[Black "Naiditsch, A."]
[Result "1-0"]
[ECO "C57"]
[WhiteElo "2660"]
[BlackElo "2639"]
[PlyCount "57"]
[EventDate "2007.10.28"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GRE"]
[Source "Mark Crowther"]
[SourceDate "2007.11.05"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 h6 7. Nxf7 Kxf7 8.
dxc6 Bc5 9. Be2 Bxf2+ 10. Kxf2 Ne4+ 11. Kf1 Rf8 12. d3 Qd4 13. Qe1 Kg8+ 14. Bf3
Ng5 15. Bxg5 hxg5 16. Ke2 e4 17. Bxe4 Bg4+ 18. Kd2 Rf2+ 19. Kc1 Raf8 20. Nc3 b4
21. Bd5+ Kh8 22. h4 Bh5 23. hxg5 g6 24. Bf3 bxc3 25. Qxc3 Qxc3 26. bxc3 Kg7 27.
Rb1 Bxf3 28. gxf3 Re8 29. Rb7 1-0

Also, Short played the 6...Nd4 variation like this in 2006:

[Event "Politiken Cup"]
[Site "Copenhagen DEN"]
[Date "2006.07.26"]
[Round "5"]
[White "Short, N."]
[Black "Jaeger, F."]
[Result "1-0"]
[ECO "C57"]
[WhiteElo "2676"]
[BlackElo "2104"]
[PlyCount "61"]
[EventDate "2006.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "DEN"]
[Source "Mark Crowther"]
[SourceDate "2006.07.31"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 Nd4 7. c3 Nxd5 8.
Nxf7 Kxf7 9. cxd4 exd4 10. Bxb5 Qe7+ 11. Kf1 Nf6 12. d3 Bb7 13. Bg5 h6 14. Bc4+
Kg6 15. Bxf6 Qxf6 16. Nd2 Bd6 17. Qg4+ Qg5 18. h3 Rae8 19. Ne4 Qxg4 20. hxg4
Bxe4 21. dxe4 Kf6 22. Re1 g6 23. g3 g5 24. Kg2 Kg7 25. Re2 Rhf8 26. Rc1 Bc5 27.
e5 Bb6 28. Rf1 Re7 29. f4 Rfe8 30. Re4 c5 31. Bb5 1-0

 An older Nd4 example:

[Event "EUCup Gr3"]
[Site "London"]
[Date "1996.??.??"]
[Round "2"]
[White "Chandler, Murray G"]
[Black "Littlewood, Paul E"]
[Result "1-0"]
[ECO "C57"]
[WhiteElo "2550"]
[BlackElo "2440"]
[PlyCount "65"]
[EventDate "1996.09.06"]
[EventType "team"]
[EventRounds "3"]
[EventCountry "ENG"]
[Source "ChessBase"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 Nd4 7. c3 Nxd5 8. h4
h6 9. Ne4 Ne6 10. Bxb5+ Bd7 11. Qa4 Ndf4 12. d4 f5 13. Ng3 Nd3+ 14. Ke2 Nxc1+
15. Rxc1 exd4 16. Nxf5 Rb8 17. Bxd7+ Qxd7 18. Qxd7+ Kxd7 19. b3 c5 20. h5 Nf4+
21. Kf1 Nxh5 22. cxd4 g6 23. Nh4 cxd4 24. Nxg6 Rg8 25. Ne5+ Kd6 26. Nd3 Be7 27.
Nd2 Kd5 28. Rc7 Bg5 29. Nf3 Rg7 30. Rc4 Bf6 31. Rc5+ Ke4 32. Re1+ Kxd3 33. Re2
1-0

I prefer 21 Rxh3 to 21 gxf3.

 37 Rd5 instead of 37 Rc5 keeps a small advantage. Whether you can win it then is a matter of technique from both sides.