This script has no zombies, no gladiators, none of the same characters, and no apparent relationship to the original script or even the original idea. The script doesn't even have "Zombies v. Gladiators" on the title page. It has to do with Greek mythology, not Roman.
I have no idea why this was entered in the ZvG contest.
I have a suspicion that this is just an original script of yours and you've entered it into this rewrite contest because it has some sort of resemblance in theme or the story occurs around the same time period.
I think the intention of this contest is to A.) prove you can work on a deadline B.) prove you can take studio notes and implement them accordingly and C.) prove you can enhance the original material.
You've accomplished A. But because it appears you've ignored B and C, the deadline doesn't really matter anyway. Because a studio wouldn't pay you to ignore their notes, write an unrelated script, and pretend it's somehow related to the original. That would get you fired (even though Charlie Kaufman actually did that with "Adaptation"... even he was almost fired, if you can believe that).
Long story short: put some zombies in there and you'll give this script a chance. Don't, and it'll have little to no chance of winning.
I have no idea why this was entered in the ZvG contest.