Provided is a game device capable of enabling a user to more readily perceive the rhythm of music when playing a game in which the player performs a game operation to the music. In the game configured so that the player performs the game operation to the music, based on reference timing data indicating a reference timing at which the player should perform the game operation, a game device indicates the reference timing to the player by moving a guide image on a game screen from a generation position to a target position while changing a direction of the guide image in accordance with a beat of the music.