12歳から始めるゼロからのpython　ダンジョン&パイソン　移動処理

#12歳から始めるゼロからのpythonゲームプログラミングchapter6ダンジョン＆パイソンの移動処理について

chapter6のダンジョンのところで__プレイヤーが移動してくれません__

##コードはこれです↓

import tkinter
# -*- coding: UTF-8 -*-


def draw_map():
    for y in range(0, MAX_HEIGHT):
        for x in range(0, MAX_WIDTH):
            p = map_data[y][x]
            canvas.create_image(x*62+31, y*62+31, image=images[p])

            canvas.create_image(brave_x*62+31, brave_y*62+31,
                image=images[4], tag="brave")

def click_botton_up():
    global brave_y
    brave_y = brave_y - 1
    canvas.coords("brave", brave_x*62+31, brave_y*62+31)

def click_botton_down():
    global brave_y
    brave_y = brave_y + 1
    canvas.coords("brave", brave_x*62+31, brave_y*62+31)

def click_botton_left():
    global brave_x
    brave_x = brave_x - 1
    canvas.coords("brave", brave_x*62+31, brave_y*62+31)

def click_botton_right():
    global brave_x
    brave_x = brave_x + 1
    canvas.coords("brave", brave_x*62+31, brave_y*62+31)
    

root = tkinter.Tk()
root.title("ダンジョン＆パイソン")
root.minsize(840, 454)
root.option_add("*font", ["メイリオ", 14])

canvas =tkinter.Canvas(width=620, height=434)
canvas.place(x=10, y=10)
canvas.create_rectangle(0, 0, 620, 434, fill="gray", tag="drawField")

button_up = tkinter.Button(text="↑")
button_up.place(x=720, y=150)
button_up["command"] = click_botton_up
button_down = tkinter.Button(text="↓")
button_down.place(x=720, y=210)
button_down["command"] = click_botton_down
button_left = tkinter.Button(text="←")
button_left.place(x=660, y=180)
button_left["command"] = click_botton_left
button_right = tkinter.Button(text="→")
button_right.place(x=780, y=180)
button_right["command"] = click_botton_right








images = [tkinter.PhotoImage(file="img6/chap6-mapfield.png"),
          tkinter.PhotoImage(file="img6/chap6-mapwall.png"), 
          tkinter.PhotoImage(file="img6/chap6-mapgoal.png"),
          tkinter.PhotoImage(file="img6/chap6-mapkey.png"),
          tkinter.PhotoImage(file="img6/chap6-mapman.png")]


MAX_WIDTH = 10
MAX_HEIGHT = 7
map_data = [[1, 0, 1, 1, 1, 1, 1, 1, 1, 1], 
            [1, 0, 0, 1, 2, 0, 0, 1, 3, 1],
            [1, 1, 0, 1, 1, 1, 0, 1, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1, 0, 1],
            [1, 0, 1, 1, 1, 1, 1, 1, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 0, 0, 1],
            [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]]

brave_x = 1
brave_y = 0


draw_map()
root.mainloop()