蒟蒻一个，请多指教 本人不玩游戏，python一般,c++不会。 蒟蒻一个，请多指教。 一个python小游戏

from tkinter import*
from tkinter import messagebox
import random
import time

class Ball:
    def __init__(self,cv,paddle,color):
        self.canvas = cv
        self.paddle = paddle
        self.id = cv.create_oval(10,10,25,25,fill = color)
        self.canvas.move(self.id,200,100)
        starts = [-3,-2,-1,1,2,3]
        random.shuffle(starts)
        self.x = starts[0]
        self.y = -3
        self.canvas_height = self.canvas.winfo_height()
        self.canvas_width = self.canvas.winfo_width()
        self.hit_bottom = False

    def hit_paddle(self,pos):
        global score
        paddle_pos = self.canvas.coords(self.paddle.id)
        if pos[2] >= paddle_pos[0] and pos[0] <= paddle_pos[2]:
            if pos[3] >= paddle_pos[1] and pos[3] <= paddle_pos[3]:
                score += 1
                return True
        return False

    def draw(bsb):
        bsb.canvas.move(bsb.id,bsb.x,bsb.y)
        pos = bsb.canvas.coords(bsb.id)
        if pos[0] <= 0:
            bsb.x = 3
        if pos[2] >= bsb.canvas_width:
            bsb.x = -3
        if bsb.hit_paddle(pos) == True:
            bsb.y = -3
        if pos[1] <= 0:
            bsb.y = 3
        if pos[3] >= bsb.canvas_height:
            bsb.hit_bottom = True

class Paddle:
    def __init__(self,cv,color):
        self.canvas = cv
        self.id = cv.create_rectangle(0,0,100,10,fill = color)
        self.canvas.move(self.id,200,300)
        self.x = 0
        self.canvas_width = self.canvas.winfo_width()
        self.canvas.bind_all('<KeyPress-Left>',self.turn_left)
        self.canvas.bind_all('<KeyPress-Right>',self.turn_right)

    def draw(self):
        self.canvas.move(self.id,self.x,0)
        pos = self.canvas.coords(self.id)
        if pos[0] <= 0:
            self.x = 0
        elif pos[2] >= self.canvas_width:
            self.x = 0

    def turn_left(self,evt):
        self.x = -3

    def turn_right(self,evt):
        self.x = 3

root = Tk(className = '弹球游戏')
root.resizable(0,0)
score = 0
cv = Canvas(root,width = 500,height = 400,bd = 0,highlightthickness = 0)
cv.pack()
root.update()

paddle = Paddle(cv,"green")
ball = Ball(cv,paddle,"red")

while 1:
    if ball.hit_bottom == False:
        ball.draw()
        paddle.draw()
    else:
        messagebox.showinfo(title = '游戏结束',message = "你的分数为：" + str(score))
        break
    root.update_idletasks()
    root.update()
    time.sleep(0.01)

小游戏，试一试（从书上抄下来的（用本地编辑器））

本人书法