pygame question

[HelloPeople1]

Hi guys i have 3 question for the pygame pong game I made:
1. I keep getting an error when i run this that has to do iwth the wx window
I made for the user to enter a speed. this is the error code:

Traceback (most recent call last):
  File "/home/armin/Documents/School/Programming/Pong/Pong Test.py", line 26, in <module>
    frame = MenuBar(parent=None,id=-1)
  File "/home/armin/Documents/School/Programming/Pong/Pong Test.py", line 22, in __init__
    speed=SpeedBox.Value()
TypeError: 'unicode' object is not callable

2. Second question is is it possible to make a menu bar in a pygame window like you can make in a wxpython window? I looked it it up and found something about a PGU but couldn't find any examples or tutorials about how to actually do it.

3. What else can I do to improve my game? what can I add? Also I wanted to make a menu screen, do i have to do this in wxpython or can i do it in the pygame screen?

You will need a sound file called "pong.wav" and "score.wav" to run this code.

Thank you for your time guys

#Various Declarations
import pygame,math,sys,os,random,pygame.mixer, wx
from pygame.locals import *

pygame.init()
pygame.mixer.init()

screen = pygame.display.set_mode((800,600),0,32)

Font = pygame.font.SysFont("Comic Sans MS", 20)

class MenuBar(wx.Frame):
    def __init__(self,parent,id):
        wx.Frame.__init__(self,parent,id,'Window',size = (300,200))
        panel = wx.Panel(self)

        SpeedBox = wx.TextEntryDialog(None,"Pick a speed (1-3)","Speed", "1")
        if SpeedBox.ShowModal()==wx.ID_OK:
            speed=SpeedBox.Value()
        
if __name__ == '__main__':
    app = wx.PySimpleApp()
    frame = MenuBar(parent=None,id=-1)
    frame.Show()
    app.MainLoop()

ball_x = 400
ball_y = 280
ball_move_x = speed
ball_move_y = speed


computer_y = 250


playerscore = 0
computerscore = 0

sound = pygame.mixer.Sound('pong.wav')
score = pygame.mixer.Sound('score.wav')
Pause = Font.render("Click p to Pause", 1, (225, 25, 0))
Resume = Font.render("Click r to Resume", 1, (225, 25, 0))
KeepPlaying = True




def playercollide(ball_y,ball_x,paddle_y):
    counter = 0
    collided = False
    if ball_x == 730:
        print (ball_y - 25) - (paddle_y + counter)
        while counter < 105:
            if ball_y - (paddle_y + counter) == 0 or (ball_y - 25) - (paddle_y + counter) > -50 and (ball_y - 25) - (paddle_y + counter) < -10:
                PlaySound(sound)
                collided = True
                break
            counter += 1
        return collided

def computercollide(ball_y,ball_x,paddle_y):
    counter = 0
    collided = False
    if ball_x == 50:
        print (ball_y - 25) - (paddle_y + counter)
        while counter < 105:
            if ball_y - (paddle_y + counter) == 0 or (ball_y - 25) - (paddle_y + counter) > -50 and (ball_y - 25) - (paddle_y + counter) < -10:
                PlaySound(sound)
                collided = True
                break
            counter += 1
        return collided


   
      

def PlaySound(name):
    name.play()


while KeepPlaying:
    screen.fill((0,0,0))
    screen.blit(Pause, (100,550))
    screen.blit(Resume, (600,550))
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            exit()
        if event.type == KEYDOWN:
            if event.key == K_p:
                KeepPlaying = False
                while KeepPlaying == False:
                    pygame.time.wait(1000)
                    for event in pygame.event.get():
                        if event.type == KEYDOWN:
                            if event.key == K_r:
                                KeepPlaying = True
                
                    
        
        #Gets the mouse position for the players paddles y coordianate
    player_x,player_y = pygame.mouse.get_pos()
    player_y -= 50

        #This moves the ball
    ball_x += ball_move_x
    ball_y += ball_move_y

        #Detects ball collion with the paddles and walls
    if ball_y > 600:
        PlaySound(sound)
        ball_move_y *= -1
        
    if ball_y < 2:
        PlaySound(sound)
        ball_move_y *= -1

    if playercollide(ball_y,ball_x,player_y):
        ball_x = 730
        ball_move_x *= -1

    if computercollide(ball_y,ball_x,computer_y):
        ball_x = 60
        ball_move_x *= -1
            

        #Detects if the players paddle trys to go outside the screen 
    if player_y > 500:
        player_y = 499 
    elif player_y < 2:
        player_y = 3

        #Detects if the computers paddle trys to go outside the screen 
    if computer_y > 500:
        computer_y = 499 
    elif computer_y < 2:
        computer_y = 3

            
        #If the ball is on the computers half the computers paddle will move towards the ball
    if ball_x < 400:
        if computer_y < ball_y:
            computer_y += 2
        elif computer_y > ball_y:
            computer_y -= 2

        #Adds to the score
    if ball_x > 780:
        PlaySound(score)
        computerscore += 1
        ball_x = 400
        ball_y = 280
    elif ball_x < 30:
        PlaySound(score)
        playerscore += 1
        ball_x = 400
        ball_y = 280

        
    PlayerScore = Font.render("Player Score: " + str(playerscore), 1, (225, 25, 0))
    ComputerScore = Font.render("Computer Score: " + str(computerscore), 1, (225, 25, 0))


        

        #Draws all the objects
    screen.lock()
    pygame.draw.rect(screen, (0,255,0), Rect((ball_x,ball_y), (25,25)))
    pygame.draw.rect(screen, (0,255,0), Rect((740,player_y), (15,100)))
    pygame.draw.rect(screen, (0,255,0), Rect((50,computer_y), (15,100)))
    screen.unlock()
    screen.blit(PlayerScore, (400,50))
    screen.blit(ComputerScore, (50,50))          
    pygame.display.update()