Un simple exemple

Voici un simple exemple.

import turtle
SQUARE_SIZE = 60
MAZE = (
 '1111111111',
 '1000000001',
 '1011111101',
 '1010101001',
 '1010001011',
 '1010111101',
 '1010000001',
 '1011011101',
 '1000001001',
 '1111111111',
)
SCREEN_WIDTH = (len(MAZE[0]) + 2) * SQUARE_SIZE
SCREEN_HEIGHT = (len(MAZE[1]) + 2) * SQUARE_SIZE
TOP = -SCREEN_HEIGHT // 2
LEFT = SCREEN_WIDTH // 2
PLAYER = dict(
 turtle=turtle.Turtle(),
 color='blue',
 x=1,
 y=1,
)
def square_draw(x, y, size, color):
 turtle.up()
 turtle.goto(x, y)
 turtle.down()
 turtle.fillcolor('red')
 turtle.begin_fill()
 for _ in range(4):
 turtle.forward(size)
 turtle.right(90)
 turtle.up()
 turtle.end_fill()
def maze_draw(maze):
 for y, line in enumerate(maze):
 for x, value in enumerate(line):
 if value == '1':
 square_draw(
 x * SQUARE_SIZE - LEFT + SQUARE_SIZE,
 y * -SQUARE_SIZE - TOP - SQUARE_SIZE,
 SQUARE_SIZE,
 'red'
 )
def player_draw(player):
 player['turtle'].clear()
 player['turtle'].up()
 x = player['x'] * SQUARE_SIZE - LEFT + SQUARE_SIZE * 1.5
 y = player['y'] * -SQUARE_SIZE - TOP - SQUARE_SIZE * 1.75
 player['turtle'].goto(x, y)
 player['turtle'].down()
 player['turtle'].fillcolor(player['color'])
 player['turtle'].begin_fill()
 player['turtle'].circle(SQUARE_SIZE // 4)
 player['turtle'].end_fill()
turtle.hideturtle()
turtle.speed(0)
screen = turtle.Screen()
screen.setup(SCREEN_WIDTH, SCREEN_HEIGHT)
PLAYER['turtle'].hideturtle()
PLAYER['turtle'].speed(0)
maze_draw(MAZE)
player_draw(PLAYER)
def player_move_left(maze, player):
 if maze[player['y']][player['x'] - 1] == '1':
 return
 player['x'] -= 1
 player_draw(player)
def player_move_right(maze, player):
 if maze[player['y']][player['x'] + 1] == '1':
 return
 player['x'] += 1
 player_draw(player)
def player_move_up(maze, player):
 if maze[player['y'] - 1][player['x']] == '1':
 return
 player['y'] -= 1
 player_draw(player)
def player_move_down(maze, player):
 if maze[player['y'] + 1][player['x']] == '1':
 return
 player['y'] += 1
 player_draw(player)
turtle.onkeypress(lambda: player_move_left(MAZE, PLAYER), 'Left')
turtle.onkeypress(lambda: player_move_right(MAZE, PLAYER), 'Right')
turtle.onkeypress(lambda: player_move_up(MAZE, PLAYER), 'Up')
turtle.onkeypress(lambda: player_move_down(MAZE, PLAYER), 'Down')
turtle.listen()
turtle.done()

Y a sans doute des trucs à revoir, et si t'es familier avec l'objet python, faire des classes.