"Deep Drill" Game

Deep Drill Idle is a self-playing mining game. There's no home screen—when the page loads, the drill is already spinning. Every metre dug earns ore, which is the only currency. There are no timers, lives, or ways to fail: the well keeps producing while you watch the stats and even while the tab is closed. Spend ore on twelve upgrades: a larger bit for faster drilling, coolant to soften rocks, a bigger hopper for richer hauls, and a night shift that boosts your rewards when you return.