Joy is a simple game focused on attention, speed, and number order. During the game, a grid filled with numbers appears on the screen in a random arrangement. The goal is to tap the numbers in ascending order before the time runs out.
The gameplay is based on short timed levels with increasing grid size. Each level presents a different layout, so the position of the numbers changes every time the level starts.
Level 1 contains a 3×3 grid with numbers from 1 to 9. The level lasts 30 seconds. Numbers appear in a random order, and the correct sequence begins from 1 and continues up to 9. Level 2 contains a 4×4 grid with numbers from 1 to 16. This level lasts 45 seconds. The numbers must be tapped in order from 1 to 16. If an incorrect number is selected, the cell briefly highlights to indicate the mistake and the sequence continues.
After completing the levels, the result can appear in the leaderboard, where up to ten high scores are stored.