Abstract: A pitcher character and a batter character are displayed on a browser image. The pitcher character throws a ball at a random speed in a random course. A behavior of the batter character is controlled through operation of a mouse by a player. Specifically, the player predicts a ball passing position and moves a pointer of the mouse to set a meet cursor at the predicted position on the browser image. The batter character swings a bat at the timing of the player clicking the mouse Depending on an overlap state between the meet cursor and the ball, it is judged whether or not the player has hit a home run. Resultant data of a game is sent to a server system along with identification information of the player. The server system totalizes resultant data to derive the total record per player, and produces a game award to be given to each player whose total record deserves it.