令人困惑的Python错误

我正在使用Python制作基本设备，但遇到了这个问题：

  File "/home/pi/Adafruit_Python_SSD1306/PyOS_V0.py", line 178, in <module>
gameMenuApp()
File "/home/pi/Adafruit_Python_SSD1306/PyOS_V0.py", line 92, in gameMenuApp
draw.text((0, 32), gameMenuText, font=StartupFinishFont,
UnboundLocalError: local variable 'gameMenuText' referenced before assignment

这没有意义，因为我在文件的开头分配了变量。我也将代码在线放入python linter中，但是没有收到错误。另外，我删除了大部分代码，以使其更易于阅读，因此，如果没有任何意义，请不要担心。我也在Github上发布了代码。https://github.com/raspiuser6969/PyOS

gameMenuText = " "
gameMenuSelect = int(1)
gameMenu = ['   Pong    ','    RPS    ']
gameMenuSelect = int(1)
def pong():
def rps():
def gameMenuApp():
   while GPIO.input(A_pin):
        draw.rectangle((0,0,128,64), outline=0, fill=0)
        draw.text((0,32), gameMenuText, font=StartupFinishFont, fill=255)
        disp.image(image)
        disp.display()
        if not(GPIO.input(D_pin)):
            gameMenuSelect = gameMenuSelect + 1
            draw.rectangle((0,0,128,64), outline=0, fill=0)
            disp.image(image)
            disp.display()
            print(gameMenuSelect)
        if not(GPIO.input(U_pin)):
            gameMenuSelect = gameMenuSelect - 1
            draw.rectangle((0,0,128,64), outline=0, fill=0)
            disp.image(image)
            disp.display()
            print(gameMenuSelect)
        if gameMenuSelect == 1:
            gameMenuText = gameMenu[gameMenuSelect - 1]
            shutdownApp()
            time.sleep(0.1)
        if gameMenuSelect == 2:
            gameMenuText = gameMenu[gameMenuSelect - 1]
            rps()
            time.sleep(0.1)
        if 2 < gameMenuSelect:
            gameMenuSelect = gameMenuSelect - 1
        if 1 > gameMenuSelect:
            gameMenuSelect = gameMenuSelect + 1