The player must control the shadow as it navigates through the tower, using shaded areas to its advantage. With the help of Spangle, a sylph who can adjust the angle of light, the player can overcome obstacles and reach previously inaccessible areas.
Gameplay involves collecting magic eyes to progress to the next level, while avoiding hazards like shadow spiders and fighting with collected shadow weapons. The game also features a memory system that allows the player to regain health points and gather information about the current level.