This is a game that I played earlier today. I feel that I played pretty bad this game, but still managed to come out 30 points ahead. (Too bad this was a free game).
I think that my main problems in this game was reading. I didn't read a lot of positions and variations out enough.
I have a lot of big mistakes here.
..And don't even ask about move 105.
Any review or feedback is appreciated.

That's not really a bad game for a 20K. You won, and you were just a move or two away from a landslide win. ( 156 at H3 and 186 at B6, and you win by 100 plus )

The biggest improvement you can make - which will make you 15K overnight - is to watch your cutting points.

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Help make L19 more organized. Make an index: https://lifein19x19.com/viewtopic.php?f=14&t=5207

Not bad at all. Basics. Basic shapes.Sorry to disagree, but there is usually no quick or simple fix for anything in Go.
(Otherwise, if Go were easy, I would have quit a long time ago. )
Go is like a marathon. There is only the step right now.
Lots and lots of baby steps (BASICS).
Improve your basics, step by step. That's all.

Thanks for the review guys! Don't worry, one of the things I'm concentrating on is the fundamentals. (I've still got a long ways to go until I reach the SDK level again.)