Have you continued playing the game building up your resources for expanding parts? Or have you stopped playing only checking in once a day / week to see if there's an update? I'm asking because i'm about 5 squares to finishing all expansions squares and was wondering if it would become impossible to continue until more sections are added. Or does it pay to continue filling orders and putting mastered businesses into your storage and then bringing them out to put into Department Stores etc?

By the way i'm only Level 21 and I notice that some of the businesses / Residential Highrises / Civic Buildings go on up to Level 31. With the rate i'm getting parts i'll probably only be at Level 22/23 before i'm fully expanded.