What are the rules for 100%? I would like to do a run and was wondering if the creator box counts towards the run or not.

Yes it does. Every box's completion level has to be 100%

https://docs.google.com/document/d/1rXpWluSEg5TcrLu3bpjS4YWCpMTsNg1h-gH4JFqqARg/edit here is the current route