Cavern Quest is a small pixel-art adventure built on one loop: go underground, fight, dig, haul the loot back to town, upgrade, and go deeper. You wake in Brightwater with a rusty sword and a stone pickaxe, and the caves around town hold slimes, bats, skeletons and golems along with copper, iron, gold and gems that the shops will buy.
Better pickaxes open up richer ore, and better swords and armor let you survive the deeper caves, so every trip feeds the next one. It runs in the browser with keyboard controls (WASD or the arrow keys to walk) and saves progress locally.