In my continuing quest to boil the concept of a 'game' down to its minimum, I've made the "is this prime" game easier and much much harder
In reply to @christianp
Video description: starting with a screen titled "Is this a quiz?", a series of questions: Is 7 a number? Is 0 a number? Is 9 a number? Is 3 even? Is 6 even? Then "Game over", and I let out a deep sigh.