SlideToPlay: "Primrose marks a bit of a departure for Rohrer, who is known mostly for developing indie games with a philosophical or political message behind them (although he is also consulting on a major commercial project for EA and Stephen Spielberg at the moment).
By contrast, Primrose is a traditional, grid-based puzzle game, albeit with a unique fusion of concepts at its core--part Reversi, part Conway's Game of Life. The idea is place colored squares on a grid in such a way that one color group is surrounded by another. This eliminates the surrounded squares, scores you points, and flips the color of the surrounding squares to the just-eliminated hue. Clever players can build high-scoring combos by setting up the squares just so and setting off a chain reaction."