With his Bishop fianchetto on g7 you should have looked to keep your pawn chain in the middle strong to restrict his movement. Don't just play en-passant because you can, in this case it makes his position stronger and yours weaker because he has effectively ripped open the centre which is of massive advantage to his Bishop on g7.
That's a basic strategic view of this game, but tactically you seem to be making a lot of mistakes too, even blunders. The nature in which you lost your Queen for instance was interesting because I think you assumed you would still be even on material being Queenless but you missed black's 17 Qh4+. You should try to cut the simple mistakes out of your game and you will find yourself beating better players more frequently.
Hi. Thanks for clicking me. I've recently started studying chess for 3 months or so now. I see great progress but I need your help. I played this game recently and I would say it is a quite typical game for me so I would love to hear some comments on wich part of my game in general I seem to need improvement on and wich parts seem to be working for someone at my level. I want to improve on my weakest skills first so I'm not leaving anything behind. I do get the feeling though that it is the middle game that is causing me trouble. I think it is also important to learn from wins because mistakes in a winning game are not as clear as in a losing one.
I played BLACK in this 10min online game with a modern defence opening and he went out of book pretty fast: