Two grids, almost identical. Somewhere in the right one, a cell is the wrong color, and you have to find it. Find it fast and it's a point. Tap the wrong cell and a life disappears, three total, and the clock keeps draining. The diffs get sneaky — smaller color shifts, bigger grids, fewer differences hiding in more noise. You start trusting your eyes less and your gut more. There's a tiny thrill when the wrongness finally jumps out at you, like it's been waiting. But take too long and the timer laughs. The board resets, you tap, you look again. It's never where you first checked.
Two grids, almost identical. Somewhere in the right one,