I was playing against a friend and we decided to write down our moves so that we could see what moves could've been altered, or which moves deserved a ! or a ??? I won't say right away who was playing as white (hopefully we recorded this properly...).

1. d4 d5, 2. Nf3 e6, 3. Bg5 f6, 4. Be3 Nc6, 5. Bf4 b5, 6. Qd2 Nge7, 7. Qd3 g5, 8. Be3 Rb8, 9. Nfd2 e5, 10. g3 Nf5, 11. Bxg5 fg5, 12. de5 Nxe5, 13. Qb3 c6, 14. f4 Nc4, 15. Nxc4 dc4, 16. Qc3 Qd5, 17. Qxh8 Qxh1, 18. Qxh7 Bc5, 19. Nd2 Ne3, 20. fg5 Ng2 , 21. Kd1 Ne3 , 22. Kc1 Nxf1, 23. Qh8 Kd7, 24. Qg7 Be7, 25. Qd4 Kc7, 26. Qxa7 Bb7, 27. Nxc4 Rd8, 28. Qb6 Kc8, 29. Nd6 Rxd6, 30. Qf2 Ne3 , 31. Qg1 Qxg1 0-1

Looking over the moves, we figured it was move 28 that ruined the game for white. Either way, I'd like to see some other, perhaps more experienced, perspectives. As I said, feel free to add exclamation points and question marks wherever necessary.