| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which makes specifications of an operation button fittable both to players who want to take part in the shifting of the game performance by operating it and those who dare not to or do not want to do so by enabling the operation button to be locked or unlocked at least at one of the forward and backward positions.SOLUTION: It is made possible to set a participation type performance mode which allows the players to take part in the shifting of the game performance by operating a performance button 42 and a non-participation type performance mode which do not allow them to do so alternatively through their prescribed operation. In the participation type performance mode, the performance button 42 can be held being unlocked and in the non-participation type performance mode, the performance button 42 is held being locked at one of the forward and backward positions. |
