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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.
I'm having the same issue. It was easy to come up with a simple algorithm, but it takes too much time.
It seems that the objective of the kata is indeed to create an optimized algorithm, and that's really hard.
I feel this kata should be at least 2-3kyu, not 5 :(