To enable the objective setting of the degree of difficulty in at least one reference action while curtailing required time and labor concerning a computer game which can make the more favorable results obtainable for one or a plurality of plays each arranged to match any one of the plurality of reference actions by making the fitness of the content of the actions by a player the higher during the playing to the content of the reference actions.

A game terminal 100 estimates calorific value consumed by a player when the content of the actions by the player during the playing coincide with the content of the reference dances using step train data 163 involved in the corresponding reference dances in the playing for at least each of a plurality of reference dances to generate data indicating a value corresponding to the calorific value. This data are loaded into a terminal memory part 160 as degree of difficulty data 164 showing the degree of difficulty of each reference dance.