Hello, my name is Stefan I’am from Germany. First I want to say that I’am totally addicted to the game and gameplay (fed up by browser games with similar theme) and the second is an apologize in advance for my bad english expression.
I’ve just finished the Game twice since the release on Steam with ~24h played in two days and I’m slightly frustrated that there are no Global Highscores for competition. I Think that would raise the motivation for replaying the Game.
kind regards
edit
I’ve noticed that the game constantly expanded, so that would be a problem with the Highscores and different Settings caused by recently modifikations. A Ladder System can be nice to avoid that circumstance and you could periodicly bring up an expansion with a Ladder reset.