Current Update 3.4:
-Changes in game balance: artifacts drop more often
Update 3.3:
-Added synchronization of achievements with Google Play Games
-Fixed bugs
...
Update 2.8:
-Added 3 new enemies
-Changes in game balance
-Fixed many bugs
Update 2.7:
-Added 5 new artifacts
-Completely reworked the resource collection system
-Added jetpack carrying capacity system (with improvements)
-Improved UI
-Improved performance optimization
-Fixed bugs