1. A game device for executing a game in which an attack on one or more attack targets is performed, comprising: remaining number-of-times information storage means for storing remaining number-of-times information that indicates a remaining number of times an attack on one or more attack targets can be performed; display means for displaying a screen that comprises: a first image containing a plurality of reference regions; and a second image; image moving means for moving at least one of the first image and the second image according to a direction instructing operation of a player; and remaining number-of-times information update means for increasing the remaining number of times based on a number of one or more reference regions included in a superposition region in which the first image and the second image are superposed on each other.