I’m not the greatest player, and I’m just getting back to go after a few years of not playing, but here are my thoughts:
In general: You play a lot of moves that don’t really challenge your opponent or stop them from building big frameworks. If you’re building territory, think about where you can build territory that will hurt your opponent’s ability to do so. There seem to be lots of points where you’re building your frameworks far from your opponent, when you could be pressing his frameworks or invading instead. This results in shapes that feel very overconcentrated. If your opponent was better at invading/reducing your territory, he could’ve ended up with tons of territory on the right and left as a result of this, while pressing you down to fairly small territories at the top and bottom.
Mostly, you both played a fairly peaceful game, but there’s also a point at the end when your opponent opens himself up to a nasty looking cut. I didn’t analyze the cut in detail, but keep an eye out for weak groups that can be isolated.
12-22(ish): I don’t really like this choice of joseki. Black seems too strong on the right to be giving him a big wall, even if you get some corner territory. He misplays a bit, (17 should be at O16), and you get compensation on the top, but I’d rather either build moyo somewhere else or build a base somewhere on the right before making this exchange.
34: I’d prefer C6 since you’ve got a stone on the right.
42: This feels too passive. I’d rather either continue the joseki with C8 or else approach the lower right corner with something like O4. Q6 could also be interesting, but it’s probably an overplay.
48: This seems passive, as well. The right side, especially, needs to be attacked. there’s no good candidate for black’s stone at M16 to attach to, and if it runs, you can get a good base in the middle to attack the right from. The D7 cut also seems suspect, and I’d rather finish that joseki with C8 than win the top stone.
72: I think the reductions on the right are more important. Unless black looks like he’ll be able to win your stone, you can always escape to the middle later. Even if you end up giving up that stone, you’ve got some big moyos pressing up into the middle that you can reinforce in exchange.
116: I think this is a mistake. You should cut at G14.
123: You still have the cut at G14, so you should try to save the left group. I think G10 connects effectively.