To provide a game device, operation method, and program, which are suitable for preventing a player from being too enthused about playing the game.

A display part 202 displays a graphic of a predetermined size at a short time interval. An updating part 204 determines that an operation designation has succeeded and updates a success rate indicated by statistical information memorized in a memory part 201 when a player's operation designation received by a reception part 203 until next graphic is displayed accords with the operation designation corresponding to a direction the displayed graphic indicates. A warning part 206 presumes that the player is too close to a screen when a variation of the success rate acquired by an acquirement part 205 increases on a large scale, and presumes that the player is tired when the variation of the success rate decreases on a large scale. The warning part 206 warns the presumed result.