Happy Draw One is a puzzle game. In the game, players need to use their fingers to draw lines on the screen, with the goal of having two small balls meet before colliding. Players need to draw a reasonable path based on the movement trajectory and speed of the balls to guide their direction of movement and ultimately make them meet. Games usually have different levels and difficulty levels, and players need to design the best path to guide the movement of the ball based on the characteristics and difficulty of each level. This game usually requires players to have a certain level of logical thinking and spatial imagination, while also testing their hand eye coordination ability.