Sell your finds, buy the next upgrade, repeat — that is the whole strategy.
Melt The Ice runs one economy: ice hides finds, finds sell for Cash, and Cash buys gear upgrades that melt ice faster. The official description states each link in that chain — “Sell your finds for CASH!” and “Upgrade your gear to melt faster!” — and melt speed is the single stat it advertises. This guide takes that system seriously: what upgrading is for, when each stage of the route pays for an upgrade, and the spending rule that follows from the evidence rather than from invented gear names or prices.
The developer has released no cost table, so this page will never quote one. What it quotes instead is measured: the badge funnel shows exactly where players stall without upgrades, which is the sharpest public picture of the upgrade curve the game offers.