Well played. Though I suspected it was a correspondence game and it was. If you and your opponents have accurate ranks you did well, especially for correspondence.
There is a comment on Move 34 about an invasion. It can't be as deep as 'a' at that point in the game because White would simply cap at 'b' and already have supporting stones on both sides.
Back to move 31, Black induced white to become stronger. Black's group on the top (being extended from) was fine.
Black made 6 points of territory in exchange for giving White ~15? points of fairly secure territory. And white has more potential to develop I think.
This doesn't really work at this point. You need more stones or better if this is played BEFORE move 31. After the exchanges, I worry about White being able to kill the corner. At least White will attack the bottom side. And even beyond that, Black is going to be in trouble. I think Black would regret this invasion. This just points to why 31 was bad to me.
, or abc, I don't know. Still doesn't seem good. Maybe best to just start with 3.
as black, at some point. I think something like this is enough:
On