Hey, that's awesome!

What I'm basically looking at is an app, where say if I start a story with some fixed number of characters, others using the app can continue the story by writing within that limited characters.

Some sort of consensus mechanism needs to be put in for connecting the story bits of each user in order and to reject the bits which doesn't suit well to the story.

This is the basic gist of what I want from the consumer perspective, I will let you the make the creative decisions on how this is built.