A good idea, unique approach. Could be a very interesting book, if expanded upon. Some minor issues such as when someone speaks it's represented as -
Person : speech
And sometimes, there is a descriptive sentence straight after the speech, with no definition that it is not part of the speech. Some sentences would sound better strung together, rather than separated as well.
My other issue, is that there are explanatory remarks placed into brackets within the story. Sometimes they disrupt the reading, at others they would work better without the brackets. The most interrupting brackets are those that say - (person from part 1/3). If the readers can't keep track of the characters by their explanations, give them names.
Overall, an enjoyable read, a great idea and very promising. I look forward to reading more by this author.