An idle game with the pretension removed. There is no home screen and no tutorial: the page loads and the bit is already cutting. Every meter pays ore, ore is the only currency, and there is no timer, no lives and no way to lose — the well keeps producing while you read the panel and while the tab is shut. Twelve upgrade tracks take the money: a wider bit, better coolant, deeper reach. Deep Drill is the most honest version of its genre, which is either a recommendation or a warning.