Game program and game device using touch panel

A computer readable storage medium having stored therein a game program to be executed by a computer of a game device having a display screen for displaying a game screen, a touch panel provided on the display screen, and a storage area, the game program causing the computer to execute:

• a step for reading from the storage area, image data of a rotating object having a predetermined rotation axis, and displaying the rotating object on the display screen;
• a step for obtaining touch position coordinates on the touch panel;
• a step for, when a contact on the touch panel is performed, calculating at each interval of a given period, an angle variation amount between coordinates displaying the rotation axis of the rotating object and the touch position coordinates;
• a step for periodically adding to a predetermined parameter stored in the storage area for a game process, a value resulting from a multiplication of a coefficient with the angle variation amount, the coefficient which changes in accordance with a size of the parameter;
• a step for changing a display angle of the rotating object on the display screen in accordance with a change in the parameter;
• and
• a step for using the parameter for the game process after the contact to the touch panel is released.