A win where I didn't kill everything

Player name: 
Bki
Player rank: 
5k
Player color: 
Black
Opponent name: 
Molegrips
Opponent rank: 
4k
Review status: 
reviewed
Reviewer: 
Review rating: 
1
Review instructions: 

This is the first game in a while I won by not killing something big. Since it's not a game that was decided by an horrendous mistake by either of the player, I think I would get the most out of a review compared to others.

In particular, what I'm hoping from this review is :
1 - Place where I missed a tesuji/move that would have given me a far better position
2 - Where my opponent could have given me an inferior result by playing correctly, and what should I have played instead.
3 - Mistakes in direction, and strategically unsound choices.

I have included some variations and consideration of my own, and would welcome comment on those too.

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