GAME MACHINE AND COMPUTER PROGRAM FOR SAME

A game machine is provided with a lottery mechanism including a plurality of pockets into which a ball can enter, an introducing mechanism for introducing a ball into the lottery mechanism, and an introduction control unit which controls the ball introducing operation performed by the introducing mechanism. The introduction control unit is provided with: an introduction completion control unit which gradually changes the value of a predetermined control parameter in accordance with a predetermined rule associated with the introducing operation (S3), while determining, on the basis of the valueof the control parameter, whether a predetermined completion condition has been satisfied (S4), and controls the introducing operation such that introduction of the game object (ball) terminates whenthe completion condition has been satisfied (S6); and a parameter changing unit which changes the value of the control parameter to a value different from the value to which the value of the controlparameter should vary in ac