I can understand some of your frustration in the comments from some of the stronger players (as they do come off as a little bit harsh). Please understand that these players have the best of intentions towards you. It's often hard to get a newer Go player to slow down and concentrate on the advice given, leading to endless loops of the same advice over and over. Those that have been around for quite a while on this forum spend quite a bit of time reviewing games, and often there is little appreciation shown for the time taken to review (many of these players will spend an hour or more examining your game if they feel you've taken the time to try and understand your own mistakes and feel that their effort will be of good use).
Now, let's put some of that behind us and talk about two things:
1) Taking your time
The main reason that you are hearing multiple reviewers talk about this is because going quickly means thoughtless mistakes. It is not useful for you or for the reviewer to try and identify which mistakes were made because you weren't thinking and which mistakes are genuine gaps in your understanding.
For this reason, posting games that you played very quickly in are not good candidates for whole reviews. With this type of game, you are better off taking a good amount of time reviewing it yourself and then asking very specific questions about positions, rather than the whole game. You will still probably get less out of this than you would out of a good review of a thoughful (long time-settings) game.
So, my advice to you in this respect would be to look at all your games yourself and try to answer your own questions about it, then post your specific questions and any thoughts you might have.
If you want a full review for a game, decide that before the game and try to take all your allotted time to avoid thoughtless mistakes.
2) This particular game
I did, in fact, look through your game. As a more intuitive-style player, I'm not really a great reviewer, so take whatever I say with a grain of salt. That being said, I'll highlight some of your moves and try to give some pointers on the opening part of the game ...
--- not a big deal, but I would have approached the upper left 3-4 stone ( 
) instead of making the approach you made to the 4-4 handicap stone. Probably more a stylistic difference than anything ...
--- This is what I would call a "slow" move. It is very close to your other stone, making them VERY strong ... but gaining very little in terms of points.
--- A waste ... as black, I would have ignored you and taken a bigger point on the board (like C15). As White, I would have taken C15 or D15 myself instead of playing in this corner again.
--- More waste, and bad shape. Black already has R16, so your shape is already asking to be broken.
--- This is the right cut to defend in normal circumstances, but it's so small now ... you have a clump of stones in the upper right, each crowding in on each other ... there's so much space all over the board. D15 or C15 is currently a huge and urgent point.
--- This is far too small ... you now have 6 stones defending a terribly small piece of territory (your Q4 stone is too far to support these, as you saw later when your opponent invaded). By contrast, your opponent has a solid 15+ points in the corner that you cannot invade. 
then takes the big move at C15 (which should have been taken much earlier by either player), leaving you well behind already, and we haven't even reached the 20th move. You could let Black cut at S14. To do so is gote for Black, and very small at this point in the game.
--- A nice, big move. I like this, though some might say you're reaching too far. I think that since you gave up so much in the upper right, you need this kind of big, aggressive move. Another good option would have been to play right at F3, starting a fight.
--- Now you make another small move. On a board like this, you might consider C9, which splits Black's left side with enough space to extend to either C6 or C12, depending on which side Black approaches you from.Those are my suggestions. It took me 30 minutes just to review the first 20 moves for you, and there's probably far more I could say if I had more time. Briefly glancing through the game, I think you would benefit more from some solid teaching games with a good teacher, rather than haphazard reviews on games that are a mess by move 20.
