When it messes up...
Quickly replace the non-working file with something that will make a blank white background or a message like: "This is broke. Please Blam."
If the viewers see anything working, they'll assume it's just thier stuff that's not working and they may still vote it thru. If you replace the file with a blank screen or a message, it'll get blammed and you'll be ok, and can resubmit later when it's working. If you replace the broken file with a working file, you're score will be reduced by the vote on the non-working version.
It's always better to HELP the bad one get blammed so you can get a real score on the working version.