A non-transitory computer-readable storage medium configured to operate a game program. The program may cause an information processing device to execute a step of storing information relating to a game part, a step of displaying a screen including a first interface capable of detecting a first user operation, a determination step of (if the first user operation is detected) determining a mode of the game part to be one of a first mode or a second mode, a change step of changing a part of the screen according to the mode of the game part determined in the determination step, and an execution step of executing the game part in the mode determined in the determination step.