Lines is a brain training game with over 500 puzzles. The aim of each game is to seize as much of the tube system as possible and draw the longest line. At the start of each level, the player can place one or more colored dots on the tracks. Each dot will turn to flowing paint and start filling up the tubes. Players can place their dots strategically by looking closely at where the other dots are placed. The objective is to cut off your opponents by taking control of the most important crossings, allowing your paint to cover the greatest distance.