Monochro Observer is a lovely little puzzle/platform game by Japanese game developer Tatsuya Koyama. Control two people, one who lives in dark and one who lives in light, as they cooperate to reach the exit together. Just look at those little munchkins, staring at each other across the impassable divide between worlds. Lonesome. Longing. The fire of passion smoldering in their eyes…okay, not that last part.