Joy is a math-based quiz game with timed challenges and a clear scoring system. On each round, a mathematical problem appears on the screen, and the player selects the correct answer from four options. Each level provides 60 seconds to respond to a series of questions.

To move to the next level, 10 questions must be completed. Level 1 focuses on addition and subtraction and gives +10 points for each correct answer. Level 2 introduces multiplication and gives +15 points for each correct answer. Points are awarded instantly for correct responses, while incorrect answers do not result in penalties.

The maximum possible score is 250 points. All results are saved in the Joy leaderboard, allowing progress to be tracked over time.