An electronic gaming machine is provided. The computer device comprises at least one data storage unit storing game data for a game, a display unit to display graphical game components to a player of the game, at least one data capture unit, such as a camera, to collect data about the player's gaze, and a processor to process the player gaze data, determine if a player gaze condition is satisfied, determine whether a game condition is satisfied. If both the player gaze condition and the game condition are satisfied, the processor modifies at least some of the graphical game components based on the player gaze condition and the game condition.