Hey, here are two games I played on tygem. I already made some comments on what I thought were the biggest direction of play mistakes, but if anybody can point out additional ones that'd be great. Generally, I seem too focused on capturing small stuff on the sides while my opponents take a huge center.

Game 1: great comeback at 125

Game 2: can you explain why R13 is bigger now than C2 (I disagree)

I wish I could, but I was a bit confused as to what was the biggest move. (I assume you talk about the position just before white's r14 invasion)

Given the annoying endgame around b10 and the fact that black isnt completely alive or connected with his bottom group, c2 might indeed be the biggest point. (with f7 sente black can always connect, though)

Indeed C2 affects the stability of the black group. And White might resist against F7 and sacrifice 3 stones while connecting large scale.