[Edit: Wrote before reading Dragon Pie's comments]

- I don't understand white's last couple of plays, but I would just B16. However, the bigger problem was

. This atari just helps white fix his weaknesses - it's a thank-you move. It would be better to just connect at B16 for

.

- This looks like some sort of weird double-Chinese. But I don't like that both of your "wings" from your 4-4 stone are low. I think Q10 is better.

- I think G17 is better. Say later in the game white is induced to capture your B15 stone. Then, you suddenly have a shape problem that needs patching, whereas with G17 you don't.

- Not a big fan of this move. K15 seems to me to be a better direction.

is really slow.

- I would rather play something like G4, G3, F3, etc.

is too thin - white could play N3 or O3 in the future and secure life. The reason you lost the game was because white did this but you didn't recognize how thin your shape was.