LineDensityPick challenges you to judge pattern density at a glance. Shapes filled with line patterns appear as either dense or sparse, and each round asks for one of those two types. Tap matching density to score. Tap the opposite density and you earn a mistake. Three mistakes end the run. Early rounds keep the spacing difference obvious. Later rounds shrink that gap until dense and sparse stripes look nearly alike. Trust line spacing rather than shape color, check the prompt, and clear every required target. It is a focused visual filter game that gets harder as contrast fades.