Life In 19x19

Just some personal opinions:
30:I would like to play at S6 since it's sente for black. And after that I'd probably play 32 at D10, E2 is too small;black could just ignore you.
134 at A18 would kill black.

Overall other than some mistakes in reading I'd say you did just fine, it was mostly black who ...

By connecting, you hurt black's lone stone. It will be hard for black to launch a successful attack. Black taking the corner doesn't seem much of a problem, because white's stone on the right still has plenty of space. Besides that, there isn't any other move I can think of, you can't afford to let ...

Key Game Moments

There were a few positions that were particularly interesting to me, both during the game, and in review.

Position 1

$$B
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O ...

I don't think blitz is a good idea especially for Kyus because it fosters the bad habit of not thinking and is of little help to your reading and judgement skills.

I don't think Black making a move on the second line is good...

Probably O3 or N3.

My preference is 4-3 because of the variety of joseki. 4-4 has grown quite boring for me.

Not seeing atari is quite common in beginners. Don't worry, just play some more games, and you will gradually improve over time.