Update the jar used by your webstart. The uploader on the java4k site was meant to be used to submit an unsigned jar in the event that you have a jar which turned out to be over 4k after you signed it.
Thank you for the advice, and the complement, but doing that feels like cheating, personally. Not that I am saying anyone who does that is doing so, just that I myself won't be.
I plan on updating the game without the 4k limit in another version. I'll be adding things like more weapons, actual level maps, and more Virtualoid types along with a 2 player mode. But not until I get done with my latest application.
Edit: I am worried about the approved of my game for the contest, as it's almost been 48 hours, and it still isn't approved. Can anyone else say how long it took for them?
Edit 2: Okay, nevermind. I'm accepted.