[Quiz & Puzzle Special] Buzz In and Think Fast: 4 Free Quiz & Puzzle Games
A brain-training game set in a cyber space, where you press number buttons to bring the target number to exactly 0. The catch is that you can't press buttons of the same shape twice in a row. Going below 0 costs you a life, so work out your subtractions quickly. Clear targets to level up and earn items that give you an edge.