GreatGrecosGhost: What an ugly opening, and an ugly game by white. Morphy showed that the best way to deal with 3.Bg4?! is to exploit the lead in development you get. White allows his pawns to be doubled, but it does remove blacks ability to castle, open a file for his rook, and win the two bishops. It's not the best strategy but it's some compensation.
However, without any development, especially on the queen side, and the open g file he leaves his own king in the center and can't punish black.
Furthermore, he refuses to use the two bishops by getting his dark squared to useful diagonal, and refuses to put his rook on the open file he created.
35. Kg3? is terrible, it's makes no attempt at stopping the passed pawn. He just stands back and watches it walk down the board. As Nimzowitsch said mere police surveillance is not enough. White resigns because he knows he will soon have to give up his bishop to stop the pawn from queening.
Better would have been 35. Kxg4 Bxf2 35. Kf3 Nxh4 36. Kxf2 Rd2 it would have left him a pawn down, and a pawn island up. Black's knight probably would have proven better, but it's way out of play and white's king is better placed. I think it's a lost endgame but at least it's putting up some sort of fight.