20 pages is the minimum amount I believe.
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Hello and welcome to the valorous kingdom of CYS!
I recommend reading Will's How Not To Write and The Land of Bad Writing since they may help you with any future storygames you may write. In addition, here’s a story that is a good example of what not to do. Moral of the story: listen to constructive criticism.
I also recommend taking a surf through all the articles in the Help & Info section, two in particular being a helpful list made by StrykerL and an excellent article on proper forum posting, if you haven’t seen it yet that is. One resource in particular worth mentioning is a very good resource for designing a storygame.
Among the things you're more than welcome to participate in:
writing prompts
a contest
a collaborative story setting
poetry prompts.
I wish you luck in any creative writing endeavors you embark on! There's also a ton of good content on this website, so I hope you find the time to read any of the featured storygames.
And remember: above all else, live your life off the wall!
...Oh, there’s also this.