1. The power of prediction: “The brain loves to make predictions,” Willis says. “In 2048, every 2 or 4 that you move is a prediction—you’re not sure it’s the best thing to do—and the game offers limitless chances to make another prediction.”
2. An achievable challenge: If a game is too easy or too hard, dopamine levels stagnate. For the optimal boost, Willis says, a game needs to be challenging but beatable. “‘Achievable challenge’ are the key words,” she says. “That’s what will give you the biggest dopamine boost.”