Octa's Mine Crasher

A Ballz-style dig. Drag to aim and release to fire all your drill balls in one volley; they bounce off the walls, the ceiling and numbered blocks, and each hit chips one point off. Rings add a ball, steel is twice as tough, gems pay more and bombs break their neighbours. After every volley the blocks sink a row and a new one arrives; break through the whole vein before a block touches the floor. Twelve veins grow deeper with more special blocks, plus a daily vein, each proved clearable by a searching digger. Fast-forward, keyboard and gamepad are supported.