In this game, you may take one step each day, and then you must wait for the next day. If you wish to complete the game, you will have to make it a part of your life for at least 100 days. Make a ritual out of it. How will you incorporate it into your daily schedule? Will you tie it to an existing activity? Will you treat it as a ritual or merely a routine? Will you add to the ritual, embellishing it in your own way, making it yours? Meditate, say a prayer, think back over what has happened while you have been playing? Will you approach it alone or share it with another?
Is it worthwhile? You'll have to answer that for yourself.
It's a pilgrimage. It's very simple, but it does have choice in it; even the smallest decisions have their consequences amplified when you can only move daily.