A good way to view it , is via Steamcharts.
http://steamcharts.com/app/304730
So approx 3k copies have been SOLD and PLAYED WITH. That’s not counting sold copies that haven’t launched the game yet or maybe not gotten it in mail etc.
3k ain’t shabby for day 2, from a indie dev and for a Tycoon/Sim game. It’ll rise over time, and even more so if YouTube stars pick it up and do Lets Plays, and then its gonna be a flock of people!
TL;DR A success