1. A game device, comprising: image capturing means for capturing player images; position recognizing means for recognizing a current position of a predetermined part of a player based on the player images captured by said image capturing means; game providing means for providing the player with a game based on the current position of the predetermined part of the player recognized by said position recognizing means; and guiding means for guiding a standard position of the predetermined part of the player with respect to said image capturing means before provision of said game is initiated.