A square sheet of paper is folded, one step at a time, left to right. The shaded part is the half that moves and the red dashes are the fold. In the last picture a hole is punched through every layer. Pick the sheet as it looks unfolded.
2:00 on the clock, and it only runs while a question is on screen.
Questions get harder as you answer correctly and easier when you miss.
You start at the first level.
Until your first miss, every right answer jumps a whole level.
A right answer scores the question's points; a wrong one costs half as many. Guessing does not pay.