This masterpiece wasis just what was missing from the world.

The other commenter gave another option, but I think this works as an alternate.
Additionally, in general media should be written about in the present tense, as if it is an immortal, living thing.

It's a story that needed to be told, and I think it is already impacting lives around world.

And I think it is already impacting lives around world.

Either drop the "and" or tack this onto the sentence beforehand.

I Wwish there washad been a movie like this 15 years ago, when I was a teenager.

It would be less hardhave been less difficult to deal with my confusionsed feelings back then.

I would maybe go so far as to connect this to the previous thought: "It would have been less difficult to deal with my confused feelings back then if I had had a movie such as yours."

But I'm glad that it exists now, and that thisese days, the current generation has gotten more representation these days.

Flow. "These days" and "this generation" sort of clunk against each other, so I changed it to flow better.

So, your work is beautiful , but Wwe need a sequel.

By putting "so" at the beginning, it sounds like you're going to criticize something. By saying it this way, you're sort of implying that EVEN THOUGH the work is beautiful, it isn't enough, and a sequel is necessary because of the lack of the film. If that isn't your intention, I would drop the so, which would also remove that sense of criticism/lack.

tThere's so much to say,! There's so much more to explore about Flores, her point of view, and her confusioned mind.

I added a comma after "view". This is called the Oxford comma if you want to look it up, and it connects a list of three or more. Basically when you have a list of X and Y and Z, you want to be clear that all three are unique parts of the list. "X, Y, and Z" maintains that, whereas "X, Y and Z" can be read to imply that Y and Z are a set, so then it's "X and (Y+Z)". The Oxford comma refuses that definition, and maintains each of the items as unique.

I want to see her self -discovery.

I want to see fFlores growing, navigating at the college and makinge... BOLD STROKES.

You can do it as "I want to see Flores grow, navigate, etc" or "I want to see Flores growing, Flores navigating college, etc." I personally think the former flows better.

And Ellie..! I love this character,. She's such a strong and smart onegirl.

"One" is weird here. You could also do "She's so strong and smart."

I'd love to see her getting more comfortable with who she is, exploring all the possibilities, making friends and, of course, keeping in touch with Paul.

The second movie wouldn't be just the two mainly characters getting together, but about their path, how they growing, and new life experiences.

A sequel tof this beautiful movie would be a present forgift to us.

I can't do anything but think about it and read fanfictions.

Fanfiction can be plural without an added s. (Just like fiction.) However, fanfic is made plural with an added s.
Fiction - Fanfiction
Fanfic - Fic ; Fanfics - Fics

I need to see those especial characters on the Sscreen again.

I know you're not a fan of sequels and I know that a sequel not depends only on more than just you, but at least consider writing and fighting for a second movie, please.

You could say "a sequel depends not only on you" but this sounds better.

This masterpiece was just what was missingneeded.

I feel "what was missing" is kind of ambiguous and sounded odd to me. You could also maybe say something like, "This masterpiece was the kind of thing that was missing in contemporary cinema."

I Wwish there was a movie like this 15 years ago, when I was a teenager.

It would behave made it less hard to deal with my confusionsng feelings back then.

Or maybe "feelings of confusion" depending on what you mean exactly.

So, your work is beautiful , but Wwe need a sequel.

tThere's so much to say, Tthere's so much to explore about Flores, her point of view, and her confusioned mind.

I want to see her self -discovery.

I want to see fFlores growing, navigating at thethrough college, and making...BOLD STROKES.

And Ellie.. I love this character, such a strong and smart one.

I'd love to see her getting more comfortable with who she is, exploring all the possibilities, making friends, and, of course, keeping in touch with Paul.

The second movie wouldn't be just the two mainly characters getting together, but about their path, growing, and new life experiences.

A sequel tof this beautiful movie would be a present for us.

I need to see those especial characters on the Sscreen again.

I know you're not a fan of sequels, and I know that a sequel not depends not only on you, but at least consider writing and fighting for a second movie, please.