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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
You're misusing the preloaded section (see https://www.codewars.com/kata/reviews/622b74e1db3671001548ef60/groups/6312167d2d235800013e0fdc for an example exploit). I suggest reading https://docs.codewars.com/authoring before publishing again.
Basic array filtering is not a novel idea. I suggest unpublishing and coming up with a more original idea.