In River Valley Glassworks, you either place a token from your hand onto one of 6 river tiles and collect tokens from one of the two adjacent river tiles, or you take tokens from the lake to replenish your supply. Tokens collected are slotted into your player board according to color or scarcity. Points are scored based on completed rows and scored for your two tallest collumns, with ties broken in favor of the lowest or furthest left collumns.