The Long Way Around
A letter appears, tilted or upside down, half the time mirror-reversed. Say if it’s the true letter or its mirror. The further it’s spun, the longer you take, because your mind turns it back, degree by degree. WIZ times the turn.
A single letter will flash up, rotated to some angle. Half the time it is the true letter; half the time it is its mirror image, flipped left-to-right.
Your only job: decide normal or mirror, ignoring how far it’s been spun. Answer as fast as you can while staying right.
Twenty-four quick letters, about two minutes. You’ll feel yourself slow down as they lean further from upright. That slowdown is the point: WIZ measures exactly how many milliseconds each degree of rotation costs you.
Nothing takes me longer upside down than upright. I read a letter and its mirror as two lists of the same points, one with its handedness flipped, and I check a single bit: do the corners wind the same way or the opposite way. You are about to do the stranger thing, to answer a question about a still picture by setting it moving and turning it, slowly, through a space only you have.
About two minutes. Actually rotate each letter upright in your mind rather than snap-guessing. Nothing is recorded or leaves this page.