Stay in Line - by YY is an engaging mobile game where players must navigate a white dot along a black track by dragging or touching the screen. The game boasts a clean and elegant design, offering beautiful maps for players to explore. The animations are super smooth, enhancing the overall gaming experience.

As players progress and achieve higher scores, the game becomes more challenging, keeping them engaged. Additionally, players can share their scores on Twitter, adding a social element to the gameplay. Furthermore, the Game Center leaderboard allows players to challenge their friends and compete for the top spot.