The counter. Broken machines arrive one after another at Impossible Repair Shop, and none of them fails in an ordinary way. You are the mechanic, and every customer wants their device back fast.
The diagnosis. Each job starts with a close look at the machine. Find what is wrong, pick the matching tool, and fix the fault. With a mouse you click parts, tools and menu buttons; on a touchscreen you tap them instead.
The timed repairs. Some fixes turn into quick challenges where you move with WASD or the arrow keys, or with touch controls on mobile. All of it runs against a timer.
The habit that helps. Inspect first, act second. Grabbing the wrong tool wastes seconds you do not have. A brain teaser with a calmer pace is 1010 Deluxe.