In the exciting new Line Side game, you can test your reaction speed and attentiveness. In front of you on the screen you will see a line that stands vertically. On its surface, a circle will gradually slide upward, gaining speed. Obstacles sticking out of the line will appear on its way. You will need to look closely at the screen. When approaching an obstacle, you will have to click on the screen with the mouse. This will change the position of the circle in relation to its movement. Remember that if you do not have time to react, then the circle will crash into the obstacle and die. If this happens, then you will fail the passage of the level.