They're not particularly strict with the submission rules. I usually provide a webstart link (plus a zip of the project source + data if anyones wants to look around) and no-one's complained yet.
I think when you've got a couple dozen entries, there's a general sense that you know a cheater when you see one. I wouldn't worry too much about the specific rules as long as you follow the spirit of the competition.
I'd suspect you're even better off with a web link rather than an .exe or something like that, I know those are the entries I'm the most likely to check out...
