The most heartbreaking issue is lost progress. You grind for a week, get the "Robot Head" blueprint, and then... poof. Gone.
: A major patch resolved an issue where ads would fail to load after the game had been running for long periods. This was a critical fix for players who rely on the ad-boost for progression. Cloud Save Security eatventure fixed
To clear cities efficiently, stop leveling up every station equally. Instead, adopt one of two community-proven layouts: The most heartbreaking issue is lost progress
You are not alone.
An exploit allowed players to duplicate gems. In response, the devs pushed a counter-patch that accidentally set some legitimate players’ gem counts to negative thousands. Cloud Save Security To clear cities efficiently, stop
You just finished a city (e.g., San Francisco). You tap "Next City." The game spins forever and then says "Connection Error."