What did I do wrong here?

I did sacrifice a pawn in the beginning but he played very good chess and beat me.

What recommendations would you make to help improve my game?  Thank you so much guys.  I am 1800 in everything, except rapid 15 minutes where I play every move lightning fast.... at the end I still had like 14:30 left haha.  My opponent came up with some good tricks.  On move 33, I made a mistake I feel.  I should have moved my king to g7.  This was a HUGE mistake which cost me the game.  Any recommendations?  Be nice but also harsh. Thanks and have a wonderful day!  Cheers!

The evaluation from the engine is below for those curious.

(110) akan100 (1734) - LeonSKennedy992 (1703) [D00]
Live Chess Chess.com, 26.09.2017
[cheni]

1.e4 d5 2.d4? dubious at best 2...g6? [simply 2...dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 with a blackmar diemer gambit from white, where they have very little compensation for the pawn: e.g 5...e6 6.Bg5 Be7 7.Bd3 Nbd7 8.0-0 c5 9.Bxf6 Nxf6 10.dxc5 Qc7 11.Kh1 Qxc5 12.Qe2 0-0 13.Ne5 Bd6 14.Nc4 Be7 15.Ne5 b6 black was a healthy pawn up in Rietveld,L (2055)-Fedorchuk,S (2665)] 3.exd5 Bg7 [3...Qxd5 4.Nf3 Bg7 5.Nc3 Qd8 6.Bc4 fianchetto systems in the scandinavain generally arene't very good, white is up a ton of tempi and has more space] 4.c4?! [4.Bb5+ c6 (4...Bd7 5.Bc4 Nf6 6.Nf3 Bf5 7.Nc3+/=) 5.dxc6 bxc6 6.Ba4 Qxd4 7.Qxd4 Bxd4 8.Nf3 Bg7 9.0-0 Nf6 10.Ne5+/= black's c6 pawn is too weak; 4.Nf3 Qxd5 5.Nc3 Qd8 6.Bc4+/=] 4...c6 5.Nc3 e6? [5...cxd5 6.cxd5 (6.Nxd5 e6 7.Qe2 Nc6 8.Nf3 Nge7 9.Nxe7 Qxe7 10.Be3 Qb4+ 11.Qd2 Qxd2+ 12.Kxd2+/=) 6...Nf6 white's doubled isolated pawns are really weak and balck as a ton of compensation] 6.dxe6 Bxe6 7.Nf3 Ne7 8.Be2 0-0 9.0-0 the queen is doing okay for now by eyeing down the d pawn, better was 9...Qb6?! [9...Nd7 10.Re1 Re8 11.h3 Nb6 12.b3 Nf5 13.Bg5 Qd7 14.Ne4 Nxd4 15.Nxd4 Qxd4 16.Qxd4 Bxd4 17.Rad1 Be5 where black has regained their pawn, but pieces are rather passive] 10.Na4 [10.d5! cxd5 11.cxd5 Bg4 12.a4 Nf5 13.a5 Qc7 14.h3 Bxf3 15.Bxf3+/-] 10...Qc7 11.Nc5 Bf5?! [>=11...Bg4 12.Ne5 Bxe2 13.Qxe2 Nf5 14.Bf4] 12.Nh4?! [12.Re1 Nd7 13.Nb3 h6 14.h3 Rae8+/-] 12...Nd7 [12...Rd8 13.Be3 Bf6 14.Nf3 Nd7 15.Nb3 Nf8] 13.Nxf5? throws away nearly all of white's advantage 13...Nxf5 14.Nxd7?! [14.Nb3 Rad8 15.Bg5 Nf6 16.g3 Rfe8 17.Bf3+/=] 14...Qxd7 15.Bg4 [15.d5 Rfe8 16.Bf3 Nd4 17.Be3 Nxf3+ 18.Qxf3 Bxb2 19.Rad1 Be5 20.dxc6 Qxc6 21.Qxc6 bxc6 22.Rd7=] 15...h5?! [15...Qxd4 16.Bxf5 gxf5 17.Qxd4 Bxd4 18.Be3 Rfd8=] 16.Bxf5 Qxf5 17.Be3 Rad8 18.Qd2?! [18.Qb3 Rd7 19.Rad1 Rfd8 20.h3 Qa5+/=] 18...b5?! [18...Bxd4 19.Bxd4 c5=] 19.Rfd1?! [19.cxb5 cxb5 20.Rfd1 Rd5 21.a4 a6 22.Qa5+/=] 19...a6? [19...bxc4=] 20.Qa5 Qc8? [20...Qe4 21.Qb6 bxc4 22.Rac1 f5 23.Qxa6 f4 24.Qxc4+ Kh7 25.Bd2 Rxd4+/=] 21.Rac1 Qb7 22.cxb5? [22.b3+/-] 22...axb5 23.Qc3 Rc8 24.Qd2 Rfd8 25.Rc5?! [25.Qc2 Rd6 26.d5 c5 27.Bxc5 Rxd5 28.b4+/=] 25...Rd5?! [25...Bf8 26.Rc2 Bg7 27.Rdc1 Rd6+/=] 26.Rxd5 cxd5 27.Bh6? [27.b3 Qb6 28.a3 Ra8 29.Ra1 Ra6 30.Qd3+/-] 27...Bf6?! [27...Bxh6 28.Qxh6 Qa7 29.g3 (29.a3 Qa4 30.Qd2 Rc2 31.Qe1 Rxb2=) 29...Qxa2 30.Rc1 Rxc1+ 31.Qxc1 Qa7=] 28.Qf4? [28.h3 Qa7 29.a3 Qa4 30.Qd3 Bh8 (30...Qc2 31.Qf3+/-) 31.b3 Qxa3 32.Qxb5+/=] 28...Qe7= 29.Kf1 Kh7?? 30.Re1 Qd8 31.h3? [31.Bf8! Rc6 (31...Qxf8 32.Qxf6 Qg7 33.Qf4) 32.Bc5+/-] 31...Rc2 32.h4 Rxb2 33.Bg5 Bxg5?? [33...Kg7=] 34.Qxf7+ Kh6 35.Re6 Rb1+ 36.Ke2 Bf6 37.Rxf6 Rb2+ 38.Kd3 Qxf6 39.Qxf6 Rxa2 40.Qg5+ Kh7 41.Qxd5 Rxf2 42.Qxb5 Kh6 43.Qg5+ Kg7 44.g4 Rg2 45.Qe7+ Kh8 46.d5 Rxg4 47.d6 Rg3+ 48.Kd4 Rg4+ 49.Kd5 Rg1 50.d7 Rd1+ 51.Ke6 Re1+ 52.Kf6 Rf1+ 53.Kxg6 Rf7 54.d8Q+ akan100 won by resignation 1-0

usually in cbv format so sorry if hard to read

Thank you for your feedback...I read it just fine.   Really, I feel my big mistake was in move 33 with Bxg5...that was my ONE and only blunder, which cost me the game.

your mistake was to play someone too good for you.

Wow....amazing insight asshole.  I played lightning fast...that is why rapid 15:10 is my weakness.  

Also, your rating of 1577 (which is very good) is not even Class B.  So please stop being rude.

I have beaten masters before.

watch your dirty language 2Q, staff don't want an engine user here.

I agree Sergeant....g5 on move 31 does indeed win for black.....though it wouldn't exactly be the easiest win as white does have A LOT of counterplay after Qxf7+ (after Bxg5).......a LOT of counterplay.  I was a bit worried about it.

Thanks for the feedback, sir.

1.e4 d5 2.d4 g6 3.exd5 Bg7 4.c4 c6 5.Nc3 e6 6.dxe6 Bxe6 7.Nf3 Ne7 8.Be2 O-O 9.O-O Qb6 10.Na4 Qc7 11.Nc5 Bf5 12.Nh4 Nd7 13.Nxf5 Nxf5 14.Nxd7 Qxd7 15.Bg4 h5 16.Bxf5 Qxf5 17.Be3 Rad8 18.Qd2 Bxd4

Move 18 bxd4 is interesting.

 It is quite interesting yes, agreed.  

Having read some of your other posts advocating sacrificing a pawn with black in the Scandinavian (which im not against) it seems to me you got into some bother in this game because you were inflexible in your approach. You didn't want to accept whites gambit with dxe4 even though this is the objectively best move.

I was mainly asking for what I can improve strategy wise.  I know I made a massive blunder on move 33.  Please stop being so negative towards me, sir.  I can tell you are a good man and good chess player.