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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.
Not games, I'm learning JS purely for Web Development. This is pretty much how I tend to code.
Game katas are the most fun to take on though :)
Do you program games? This seems to be very object oriented.