Quizthorn

Quizthorn is a general-knowledge trivia climb. Each floor of a thorny tower offers two categories to choose from, then a timed question with four answers; a right answer climbs one floor, a wrong answer or an empty timer costs one of three hearts. Floors 1-5 are easy, 6-10 medium and 11-15 hard, and thorn roses on floors 5 and 10 give a heart back. Three lifelines (50:50, skip, +10 seconds) are good once per run. The bank holds 312 questions in eight categories. A duel mode lets two players buzz on one keyboard. It plays in the browser with a keyboard, mouse or touch.