I know it's not the convention, but a 9x9 game review may be exactly what I need and it's not so much trouble for the reviewer because it's fast. I remember playing a lot of 9x9 games when I was starting and it really helped me improve my reading a little bit. I'm sure that's what I need now. So, please review. I will be most grateful. Thanks in advance.

BTW, I played white. I decided to start and early fight. I tried to separate all blacks groups, in order to, in the end, be able to capture at least one of them.

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My blog with World Go news in Portuguese: Jornal do Go
The link to the Google Translation to English: Jornal Do Go

Sometime around move 19 you should be playing A5, I think. As a general rule, you should do it while it is sente.

Move 25 at H6 is lethal. Playing F4 is small and gote. Besides, if you have adopted a plan of killing something, stick with it. Make your eyes by killing something.

Note the similarity between the two above mentioned moves. Play along the side like this can be bigger that one's intuition suggests.

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Move 53: If Black plays elsewhere then the White hane at F1 kills Black.

EDIT: Here are some thoughts about 56
Move 56: Winning the ko here is not the biggest move I think.
White can close the game without worrying about Black to pull something unexpected of.

The diagram shows an alternativ to White 56 (as 2):

But winning the ko W won the game by 8.5 points...

Joaz, you are right about F4. But I didn't play it for eyes... My poor reading made me think that it would be sente. Only after playing it I realized it wasn't.

But what about the top right? Was it possible to do something up there?

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My blog with World Go news in Portuguese: Jornal do Go
The link to the Google Translation to English: Jornal Do Go

You are right, sorry^^.

Anyway I'm not sure about the top right corner I don't think white can force Black to 1 eye and White can't make 2 eyes.
A seki is also not possible because white needs to fill out all outside libertys first.

I think Black 55 is enough to live and Black 61 is a wasted move. Of course 55 could be a wasted move too.

Actually, Blade, I worked out some variations just now and figured some ways B dies. The variations are added at the end of the game, from move 60 on.

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My blog with World Go news in Portuguese: Jornal do Go
The link to the Google Translation to English: Jornal Do Go

Thanks!
I looked at your variations but I think black needs to make a mistake to die.
So it's not needed to defend, I think.

But it all doesn't matter since Black still can not win the game (after he survived white's attack).