displaying a plurality of target objects on a plurality of mutually spaced positions on a touchscreen;

moving a specific object from a prescribed start position to a plurality of adjacent target objects that are adjacent to each other among the plurality of target objects, the specific object simultaneously arriving at the plurality of adjacent target objects;

detecting a prescribed operation that is input to the touchscreen in connection with moving the specific object;

determining whether the prescribed operation is input within a validity determination area including at least the plurality of adjacent target objects and an area therebetween;

determining whether the prescribed operation is input at a prescribed timing;

switching a first game mode in which the specific object appears, to a second game mode in which a number of target objects displayed is fewer than in the first game mode and the specific object does not appear; and

moving, in the second game mode, a non-specific object from the prescribed start position to a first target object of the plurality of target objects, the non-specific object arriving at only the first target object.