The game is played from a top-down perspective using a 2D engine in different phases. Initially, you can roam your cave freely, molding the walls at your discretion by pushing and pulling into them to create rooms needed for energy channeling or creating upgrades for your character. You then progress to a menu-based interface where you control the energy production and decide what to upgrade, equip, and summon monsters to aid you. Each turn brings new challenges in the form of surface-dwelling adventurers, which you must fight with your weapons and magic spells.
As you reach certain quotas of energy production, you get to move on to another scenario in a different cave. You can create summon rooms to invoke creatures that can aid you in combat, gather energy, and other resources. Your room placements according to Feng Shui principles also grant bonuses and upgrades, while facing cave-dwelling monsters and non-player characters (NPCs) that may or may not aid you.