Abstract: Provided is a game machine which can support a user to change a trajectory of a moving object to a desired trajectory in a game in which the moving object located in a game space moves along a trajectory determined according to content of an operation performed on a controller. A desired trajectory data acquiring section (70) acquires desired trajectory data indicating the desired trajectory inputted by handwriting by the user. A corresponding operation judging section (72) judges the content of the operation corresponding to the desired trajectory based on the desired trajectory data acquired by the desired trajectory data acquiring section (70). A corresponding operation guiding section (74) guides the user to the content of the operation judged by the corresponding operation judging section (72).

Abstract: A video game is played on a video game system by moving objects successively introduced into a game field in one direction on a display screen, determining whether a leading object or a leading cluster of objects introduced into the game field reach a predetermined position in the display screen or a memory, and ending the video game if the leading object or the leading cluster of objects introduced into the game field reaches the predetermined position. It is determined whether objects of one type are successively connected in the game field or not. The objects of one type are removed from the game field if they are successively connected in the game field. An object present ahead of the removed objects in the direction is moved in a direction opposite to the direction. An object indicated by a cursor is exchanged for an object present in the game field.

Abstract: In a receiving circuit which serves as a system in use, a gate circuit is enabled in response to a specifying signal. In a receiving circuit which serves as a backup system, a gate circuit is enabled in response to a specifying signal. When no signal is applied to an input terminal, alarm detection signals are outputted. However, a system-in-use/backup-system specifying circuit is first supplied with the alarm detection signal of the backup system. Thus, the system-in-use/backup-system specifying circuit determines or detects that the receiving circuit serving as the system in use is normal.