Lines is a strategic puzzle game with over 500 levels. The objective of the game is to draw the longest line. At the start of each level, various colorful dots are placed on the tracks. When the level begins, the dots will turn to paint, and this paint will flow through the tubes to fill them. The player may also place one or more of their own dots of paint on the tracks. When two colors meet, they will stop flowing. Players must place their dots strategically to block their opponents and seize the largest portion of the tube system.