The premise of the game is simple: You play as the shadow of a boy that's been severed from his body. Beginning at the ground floor of a massive tower, you guide his shadow form back to the top, where the two will (hopefully) be reunited. The core gameplay is simple. The shadow boy has a sword and can run, jump, climb obstacles and duel with enemies -- again, shades of classic Prince of Persia. The twist often literally came in the form of moving physical foreground elements in the level I played in order to reach new areas, and even defeat otherwise invulnerable enemies.