No, I haven't, but it got your attention. I've been perusing the site and reading a few of the uploaded scripts. Many of the new writers on this site have dozens of screenplays uploaded. Why? Is it the fact once they've finished their first project they come here for advice? What advice is given the most? Usually it's "Great, now put it away and write a few more".
They hear the same thing over and over, "Write more to become better". I hate to pee on your parade but you're not getting better. Number 100 reads as bad as number 1.
After writing that first project you're so proud of ( Hey, we've all been there ) compare it to some other scripts. Not scripts your buddy wrote. Not scripts your mama wrote. Not scripts you find on this site. I'm talking about PRODUCED scripts. Compare the lean and to the point action paragraphs. Notice I said lean, as in a few sentences. Compare your dialogue (for some it's more like monologue). Compare your white space on the page to theirs.
Feedback is crucial. I'm not saying go out and spend a small fortune on feedback, especially on your first script. There are people and places where you can get some basic feedback for free. They usually read the first 5 pages and let you know immediately the problems. Hint* It's usually what I've already covered.
So congrats on all that time you spent pounding those keyboards to crank out stories, but now it's rewrite time.