To provide a world-view where reality and a dream are associated by expressing a world wherein a game space is expanded to a plurality of game spaces of the same configuration in a game to be performed through the use of a computer, and linking the game space expressing the reality with that expressing the dream.

A game performing means 30 displays the game space of a reality world 1(3) on a screen 11 by performing a game program on the basis of set parameters and data. When a transfer event is performed in the reality world 3, a display control means 32 changes over the display of the screen 11 in the game space of a dream world 2 with the space configuration being the same as that of the reality world 1. An event processing means 31 changes the parameter or data to be used for performing the program in the reality world 1 in response to a prescribed event result performed in the dream world 2, performs changeover, and then gives changes to the reality world 1 displayed on the screen 11.