A non-transitory computer readable medium stores a program causing a computer to execute: displaying a target object on each of mutually spaced positions on the touchscreen; moving a specific object from a prescribed start position to target objects that are adjacent to each other among the plurality of target objects, the specific object simultaneously arriving at the adjacent target objects; detecting a prescribed operation input to the touchscreen in connection with the moving specific object; determining whether or not the prescribed operation is input within a validity determination area including at least the adjacent target objects and an area therebetween; and determining whether or not the prescribed operation is input at a prescribed timing.