The concept of this is interesting and I'm sure there is a lot of fun to be had with a future invasion by the Jurassic Park dinosaurs.
Unfortunately your screenplay is in a style that is very hard to read. I think your using something like a shooting script format which is not the format you'll need for the first stage of a project. You are also doing something that I've been told I need to stop doing which is over writing the actions. A tight fast style makes things much more readable.
When you read professional scripts on this website think about what you find readable and then try to replicate the style. For the format I understand that if you go to Celtx.com you can download free formatting software. Software gives you a great head start on getting a finished look to your work.