So.. how to initiate addition of new category? :)

We definitely need "Spaceport" and "100%" (all presents).

@neatep, this is impressive! :D

Why do you use Ranger Station, not Tennis Court or Skate Park? (or Gazebo :))

I thought 2BT means 2BT only, and if you use more it becomes Any%. So in 2BT you optimize for commute time and services, and in Any% you just build as fast as you can using a lot of tiles of any size. So it is kind of extensive vs. intensive runs. Right now, you can "accidentally" make a run in both categories. It's confusing..

I did the 1M run and it was quite tedious )

"Build Rewards & Business Deals" are basically achievements. So unlocking and building all of them means 100% run. It could be split into segments conveniently and overall fun to run.

One other speedrun challenge I have seen is the International Airport Upgrading:

A lot of room for optimizations )