Key Rules
Objective: Extract all artifacts before your fuel runs out. Every artifact crushed is a mission failure — you can't win with a lost artifact.
Gravity: After any clear, blocks fall down to fill empty space. Empty columns remain as permanent shafts — the rock doesn't slide sideways. Plan carefully: clearing an entire column splits the board in two.
Crush Rule: A block that falls 2+ tiles and lands next to an exposed artifact destroys it instantly — immediate mission failure. Clear gently around exposed artifacts.
Fuel: Cluster clear = 1 · Sandstone hit = 1 · Blast = 3. Hit zero before extracting all artifacts = mission failed.