There was no move 26. Nxg6.
26 Nxg4 was not an inaccuracy when I ran it but 26 Qxg4 was a better move, leading to mate in 3.
[Date "01/20/2022 10:09PM"]
[FEN rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1]
[White "Rainnzz_XD3"]
[Black "jaguer91"]
[Result "Rainnzz_XD3 won by checkmate"]
[WhiteElo "662"]
[BlackElo "757"]
[Termination "Rainnzz_XD3 won by checkmate"]
1.Nf3 {60:00} e5 {59:48} 2.Nxe5 {59:55} f6 {59:33} 3.Nf3 {59:51} d6 {59:28} 4.g3 {59:49} Nc6 {59:16} 5.Bg2 {59:48} Bd7 {58:57} 6.O-O {59:45} f5 {58:41} 7.d3 {59:43} Qf6 {58:10} 8.e4 {59:27} h6 {57:43} 9.Nbd2 {59:19} Nge7 {57:15} 10.Rb1 {59:17} O-O-O {57:01} 11.b3 {59:14} Nb4 {56:26} 12.Bb2 {59:12} Qe6 {55:57} 13.Re1 {58:41} Bb5 {54:54} 14.exf5 {58:37} Nxf5 {54:16} 15.Rxe6 {58:35} Nxa2 {53:59} 16.Bh3 {57:36} Nb4 {52:27} 17.Bxf5 {57:29} g5 {52:00} 18.Rxd6+ {57:15} Bd7 {51:34} 19.Bxd7+ {56:59} Rxd7 {51:31} 20.Re6 {56:55} g4 {51:04} 21.Bxh8 {56:52} Bc5 {47:02} 22.Re8+ {56:37} Rd8 {46:59} 23.Rxd8+ {56:36} Kxd8 {46:57} 24.Bf6+ {56:35} Kd7 {46:54} 25.Ne5+ {56:33} Ke6 {46:44} 26.Nxg4 {56:31} Kf5 {46:37} 27.Qf3+ {56:26} Kg6 {46:32} 28.Ne5+ {56:16} Kh7 {46:23} 29.Qe4+ {56:05} Kg8 {46:19} 30.Qg6+ {56:01} Kf8 {46:12} 31.Nd7# {56:00} {Rainnzz_XD3 won by checkmate}