Down the Line

Players fill a grid of 16 squares with randomly-selected numbered tiles. Each grid square has a color assigned to it; only tiles matching that color may be played in that square. Each row and column must have all 4 numbered tiles in descending order before a row can be scored. These tiles are saved for scoring at game's end. Any cleared row or column is reset with a new color pattern for its 4 squares, and may be filled again.