Did i play wrong?

okay i know i won here, but it is because my opponent played pretty badly. I want to know if i played wrong in the opening (more specifically E5) i felt like i did. If so, what could have white done? Also, i am not sure but i think that move 20.... Bg4 was i mistake.

It's fine to play this position with 2...e5. White played in a very strange way, usually in these positions white goes for g3, Bg2, 0-0, d3, Nh4 and f4 and black plays with ...d6, ...g6, ...Bg7, ...Nge7 (not Nf6), ...0-0, ...f5 (Nf6 would obstruct the f pawn). Stuff like that. 

Since white went nuts in the opening I think Nf6 with Bxc5 is good. I thought a6 was not necessary. Bb5 can always be answered by Nd4, Nge7 or even d6. No big deal there. Also, if you had played 7...Ba7 white would have a problem because the natural 8.d3 lets black play the annoying Ng4.

thanks for the feedback really helped me see that i was focusing on the wrong thing. I got lost after Ba7 though idk how that's possible lol.

thank you. So i shouldn't have played e5?

e5 is a positional blunder imo.  white is going to re-route his knight on f3 around to e3 and then be able to plop a knight into the nice hole you made for him on d5, this is a very powerful outpost and since you have no pawns that can kick it you will allow white to likely achieve a nice advantage going into the middlegame.  Typically moves instead would be d6 or Nc6.

The problem with 2...e5 is that it creates a hole in d5, and the white knight can take this square at any time, helped by the e4 pawn.

thank you guys for the feedback so i see that e5 is bad because i give white too much control. I'm still wondering though if it is enough for white to win? I'd like to see another game where black plays e5, just to see the outcome. I am just curious..

e5 makes it vulnurable on d5, which the white knight can jump to. I would suggest e6 instead.

jaja that game was epic. I guess it all depends how well white knows how to use black's weakness against him.

jerry, White was right to castle. If after 16. 0-0 Black plays 16...Qxe2??, then 17. Qxg5 wins a lot of material by force.

did you mean why didn't i play 5.......Cxb4  ? well, i didnt want to give him the open rook file, but now i see that i would have been up a pawn?

a pawn is a pawn is a pawn