Beware giant blocks of description!
Don’t get carried away with description. Remember, a page should equal about a minute of screen time. If you have a lot of action, be economical with how you describe it, and break up the key moments into new paragraphs.
Also, don’t let those characters monologue too often. There’s a difference between the style of speech in plays and movies.
Read more about “white space” at Screencraft.org