Can anyone help me?
What could be better?.

Are you white or black?
White. It SAYS so on the board... the first listed player is white. :)

11. Ne2 ? This move loses your e4 pawn, but fortunately your opponent missed it.
as said above, after 15. Bb4, your opponent can still castle after 15....c5
All in all your opponent made poor choices, and your job was easy. Other than watching that e4 pawn, no major blunders.
"9.bxc6 as expected"
Why is it expected? If I were black (I wouldnt play this opening but...) I'd play Bxc6 maintaining some form of pawn structure and trying to put pressure on the e4 pawn. maybe with f5 (If white swaps queens) or Nf6.
Does not matter if white swaps queens the Queens rook is developed with tempo.
Stil I'd prefer White ever so slightly but a better alternative to the move played for black.

I agree with the e4 blunder. Luckily your opponent hasn't seemed to develop much of a middle game, which was good for you. Plus, even though the center wasn't controled by the quick an easy center-pawn-advancement in the opening game, your opponent figured his bishops could do all of the work for him. Hmmm...seemed like he was playing more devensively rather than offensively. It's good to have a combination, yeah? And your opponent wasted moves with the one-pawn excursion. I felt like he was more sight-seeing than trying to reach his destination. So, you played well, in short...and you didn't even need to develop much of a diagonal game to achieve checkmate. Hooray! :)

An interesting defense by black... you generally see the c bishop fianchetto'd after 1...d6 and 2...e6. I think I've seen this before somewhere, but I can't remember the name. Similar to Hedgehog or French defense, I think.

1.d6 personally I don't like this move I think e5 is better Black should fight for an equal stake of the center.
On move 4.d4 good you got both your knights and your place 2 pawns in the center.
11.a6? and then 12.Bc8 was a mistake why didn't he castle? moving the Bishop to c8 doesn't make any sense to me.
I agree about 11.Ne2? this just loses a pawn You should have left the Knight where it was.
Hi!
I just finished a game, and was wondering if I could get some good analysis on it. Thanks! ☺ (So what it I won?)