シューティングゲームのスコアを表示したいです

前提・実現したいこと

たのしいプログラミング PYTHONではじめよう！という本を参考にシューティングゲームを作っています。
パドルにボールが当たる度に100点が追加されるスコアをつくり、ゲーム画面に経過を表示し、ゲームオーバーの画面にリザルトとして表示したいです。
どのようなコードを書けばよいでしょうか。

該当のソースコード

Python
1from tkinter import *
2import random
3import time
4
5class Ball:
6    def __init__ (self, canvas, paddle, color):
7        self.canvas = canvas
8        self.paddle = paddle
9        self.id = canvas.create_oval(10, 10, 25, 25, fill=color)
10        self.canvas.move(self.id, 245, 100)
11        starts = [-3, -2, -1, 1, 2, 3]
12        random.shuffle(starts)
13        self.x = starts[0]
14        self.y = -3
15        self.canvas_height = self.canvas.winfo_height()
16        self.canvas_width = self.canvas.winfo_width()
17        self.hit_bottom = False
18    
19    def hit_paddle(self, pos):
20        paddle_pos = self.canvas.coords(self.paddle.id)
21        if pos[2] >= paddle_pos[0] and pos[0] <= paddle_pos[2]:
22            if pos[3] >= paddle_pos[1] and pos[3] <= paddle_pos[3]:
23                return True
24        return False
25
26    def draw(self):
27        self.canvas.move(self.id, self.x, self.y)
28        pos = self.canvas.coords(self.id)
29        if pos[1] <= 0:
30            self.y = 3
31        if pos[3] >= self.canvas_height:
32            self.hit_bottom = True
33        if self.hit_paddle(pos) == True:
34            self.y = -3
35        if pos[0] <= 0:
36            self.x = 3
37        if pos[2] >= self.canvas_width:
38            self.x = -3
39
40class Paddle:
41    def __init__(self,canvas,color):
42        self.canvas = canvas
43        self.id = canvas.create_rectangle(0, 0, 100, 10, fill=color)
44        self.canvas.move(self.id, 200,300)
45        self.x = 0
46        self.canvas_width = self.canvas.winfo_width()
47        self.canvas.bind_all('<KeyPress-Left>', self.turn_left)
48        self.canvas.bind_all('<KeyPress-Right>', self.turn_right)
49        self.canvas.bind_all('<KeyPress-space>', self.game_start)
50        self.state = 1
51
52    def draw(self):
53        self.canvas.move(self.id, self.x, 0)
54        pos = self.canvas.coords(self.id)
55        if pos[0] <= 0:
56            self.x = -0
57        elif pos[2] >= self.canvas_width:
58            self.x = 0
59
60    def turn_left(self, evt):
61        self.x = -2
62    def turn_right(self, evt):
63        self.x = 2
64    def game_start(self, evn):
65        self.state = 2
66
67class Score():
68    def __init__(self):
69        self.font  = pygame.font.SysFont("System", F_P_SIZE)
70        self.point = 0000
71        self.id = canvas.create_polygon(0, 0, 10, 10, fill=color)
72    def cal_score(self):
73        if ball.hit_paddle == True:
74            self.point += point*100
75        if ball.hit_bottom == True:
76            self.point += point + 0
77    def draw(self):
78        text = self.font.render("{:04d}".format(self.point), True, (63,255,63))
79        surface.blit(text, [10, 5])
80            
81tk = Tk()
82tk.title("Game")
83tk.resizable(0,0)
84tk.wm_attributes("-topmost",1)
85canvas = Canvas(tk, width=500, height=400, bd=0,highlightthickness=0)
86canvas.pack()
87tk.update()
88
89paddle = Paddle(canvas, 'blue')
90ball = Ball(canvas, paddle, 'red')
91
92while True:
93    if paddle.state == 1:
94        canvas.create_rectangle(500, 400, 0, 0, fill='white', tag="start_screen")
95        canvas.create_text(250, 80, text = '-- Bounce Game --',
96                                    fill='red', font=('System', 40), 
97                                    tag="start_message")
98        canvas.create_text(250, 200, text = 'START PUSH SPACE',
99                                     fill='red', font=('System', 40), 
100                                     tag="start_message")
101    if ball.hit_bottom == False and paddle.state == 2:
102        ball.draw()
103        paddle.draw()
104        canvas.delete("start_message")
105        canvas.delete("start_screen")
106    if ball.hit_bottom == True:
107        canvas.create_rectangle(500, 400, 0, 0, fill='white')
108        canvas.create_text(250, 150, text = 'GAME OVER!',
109                                     fill='red', 
110                                     font=('System', 70))
111        time.sleep(0.01)
112    tk.update_idletasks()
113    tk.update()
114    time.sleep(0.01)
115
116