Patent ID: 8414393

Claim:
A game device, which executes a game configured such that a position of a body part of a player at a given time point is determined, comprising: player position information acquiring means for acquiring player position information relating to the position of the body part of the player; reference data acquiring means for acquiring reference data from means for storing the reference data, the reference data being obtained by associating information relating to a reference time point with information relating to a reference position in which the body part is to be placed at the reference time point; guide showing means for showing the player the reference time point and the reference position based on the reference data; first determination means for determining whether or not the reference position and the position of the body part of the player indicated by the player position information acquired at a first determination time point, which is a time point set based on the reference time point and which is earlier than the reference time point, satisfy a first criterion relating to a positional displacement between the position of the body part and the reference position; second determination means for determining whether or not the reference position and the position of the body part of the player indicated by the player position information acquired at a second determination time point, which is a time point set based on the reference time point and which is later than the first determination time point, satisfy a second criterion which is a criterion relating to the positional displacement between the position of the body part and the reference position and which indicates a smaller positional displacement than the positional displacement indicated by the first criterion; first processing execution means for performing processing relating to effects on the game based on a determination result from the first determination means; and second processing execution means for performing processing relating to evaluation of the player based on a determination result from the second determination means.