Move 16: This black pincer stone is ill advised, and should be attacked, but when white plays the keima against it, it asks it to strengthen itself. If white continues this way, then white's goal needs to be to use the strength gained by leaning on the pincer stone to attack the corner, but after move 37 at Q14, white has a weak group and no strong attack. Consider something more balanced, like the one space jump, instead.
Move 38: At this point, taking the corner weakens the white N16 group even further. Probably not good.
Move 62: No comment on the ladder, really. Black was very kind and should have just responded to white's move normally, because it doesn't threaten to make the ladder work.
Move 74: Black's move is gote, to try and keep white from causing problems with the dead stones. White can play at F3 or so to neutralize black's bottomside wall some and close the corner, or at P6 to take it from the other direction and enlarge the bottom right.
Move 82: White can play at B2 and black can't cut because of the chapel shape.
Move 84: This move plays into a position where black has already peeped to cut at C5. The cut is complicated but leaves black quite happy if played.
Through 103: White is building a wall in exchange for giving up territory, but black has lots of outside strength already, due to the ladder and the bottom right wall and extension. This means that white can't expect to get a lot of points out of the wall, and with this sequence, white ends up terribly overconcentrated in the bottom left. White has played 8 or so stones to secure 4 points.
Move 120: To this point, white has done a great job and broken through black's lines. Instead of the relatively open center, white should concentrate on trashing Black's lower side first, I think. It is much closer to being territory.
Move 152: Black can't break in strongly from this side anymore, so protect the other side or reduce black's top left.
The ko: completely pointless with the score this unbalanced, but it doesn't hurt white either so there's no reason not to play it if you want to keep playing.
As a side note which, I often hear from DDKs or so that they like to 'practice kos' but a large part of getting good at kos is to figure out when you should start one and when you shouldn't. Creating them for practice could mean creating a ko that is highly unfavourable to you, which isn't really practice at all. In addition, when the value of the ko doesn't matter because one player is too far ahead for it to matter, they don't necessarily play the best moves because they don't have to. In a sense, you should be practicing kos all the time, by looking to see where one might appear, and by keeping track of the ko threats each side has, or at a minimum, who has more. As long as you are aware of that, the actual manipulation of the ko doesn't matter so much.
Hopefully this was helpful.
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5c23d133b36d7001acda2c6d8a41e3a3041530f3.sgf [2.12 KiB]
is important because Black has a weakness at 'a'.