All you can really do is change how long each building has to wait before being built, and the color variety! Usually all of the colors are around 60!
The music is from a awesome electronic music maker, called DJ Striden; song name: DJ Striden - Lunar I don't know if anyone else sees it, but the reason I called it City Builder is because it looks like a birds-eye view of a city being built! Also very trippy.
