Crystal Cave Sort

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Crystal Cave Sort is a browser-based puzzle game in which you pour gemstones between crystal tunnels until every tunnel holds a single gem type. Each puzzle gives you a fixed number of tunnels — typically 4 to 6 — containing mixed stacks of rubies, sapphires, emeralds, amethysts, and other gems. You tap a source tunnel, then tap a destination to move the top gem, but only matching gems can stack and a full tunnel is locked. The game spans 200 levels organized across 8 themed cave worlds, with difficulty climbing gradually from straightforward 4-color sorts to complex 6-color tangles. Stars are awarded per level — up to 3 — based on move efficiency, and earned gem coins let you unlock decorative tunnel themes. Progress saves automatically in the browser, no installation needed. Easy, Medium, and Hard modes let you control the overall challenge. A typical session runs 10 to 20 minutes, making it practical for short breaks. No ads interrupt mid-puzzle.