New Growth System: Deep Tunnel Update!

A new growth system is here! Dig into the Deep Tunnel with your pickaxe. Strike the walls to break them down and claim the gems and ore that pour out. Ice, Flame, and Lightning stages appear in turn, and each must be cleared before time runs out. Upgrade your pickaxe and workers and advance your Core Research to reach ever deeper. Rake in the rewards and complete the digger's journal!