What's a good Android game for relaxing with simple yet challenging line-drawing puzzles?

Connect Balls - Line Puzzle - is perfect for unwinding while keeping your mind engaged. The gameplay is simple: connect matching balls with lines to fill the entire board without any overlapping. As you progress, the puzzles become more intricate, offering a satisfying challenge without being overly stressful. It’s a fantastic way to de-stress during a commute or take a break during the day. The game’s clean and colorful design adds to the relaxing atmosphere, and the intuitive controls make it easy to pick up and play anytime, anywhere. With hundreds of levels, Connect Balls provides hours of puzzle-solving fun, making it an ideal choice for anyone looking for a relaxing yet mentally stimulating game.