Up for a challenge? In Line Climber, you control a ball and try to avoid the obstacles while trying to collect all the stars in a level. Use your arrow keys to control the ball and jump on the platforms to climb to the finish line. As you progress, levels will become more challenging and require you to think twice before making a move. You'll lose the game if you fall from a platform, jump on spiky and red colored platforms or jump to the spiky walls on each side of the level.