Ping pong

[Shrekami]

I found out that if you increase the speed for the ball is starts glitching and the ball goes through the wall and the points get added

[Shrekami]

Also I have 2 questions why does messagebox not work, I tried many times and it didn't work so I substituted the messagebox for print but that is when the second problem comes the app doesn;t even check the module points even though I put it everywhere so that the app can see it but it still doesn't see?This is the code that I added that has these trouble going on in him

def points():
global num1, num2, text1,text2
if num1==11 or num1>=11:
if num1-num2==2 or num1-num2>=2:
print("Player1 has won")
else:
return

if num2==11 or num2>=11:
    if num2-num1==2 or num2-num1>=2:
        print("Player2 has won")
    else:
        return