Well, firstly you need a level creation contest, then ask the main people who organised it if you could be a judge. If they say yes, then once the contest starts you play all the levels and at the end you talk with the other judges about which was the best. Then you announce the winner and runner up and the you give away the prizes to those people. The end.

Do you mean how to create one? I'm sorry, your post is misleading.
If you want to create a contest, you are slightly too late, as one is going on right now.

One's going on now? Huh?

So it's like a vote

Once Red or someone else makes a Level Creation Contest, ask the creator if you can be a judge. Simple.

@G0o-gle: I'm deleting your forum posts that are criticizing gooey goo for no reason. Stop being mean. He's asking legitimate questions, so give legitimate answers.

Oh, I made that song. It was bad, but at least I gave something.

Holy moly, totally forgot about that contest. I should get started soon.

Why does red the green choose?

Choose what?