Survive higher climbs
Buy warmth when cold ends your run before you reach the crystals you want.
Mine a Mountain Upgrades
Compare warmth, pickaxe, and backpack upgrades by the problem they solve: freezing, slow mining, or too many sell trips.
Upgrade roles
Choose the bottleneck, then buy
This role model is safer than exact ROI claims until upgrade prices and crystal values are confirmed.
Mine faster
Buy pickaxe upgrades when mining time is slowing cash farming more than survival or capacity.
Carry longer
Buy backpack space when frequent sell trips cut into your crystal route.