Snake Game in Python Code

import turtle
import time

delay = 0.1

# Set up the screen
wn = turtle.Screen()
wn.title("Snake Game by Oskar")
wn.bgcolor("green")
wn.setup(width=600, height=600)
wn.tracer(0) # Turns off the screen updates

# Snake head
head = turtle.Turtle
head.speed(0)
head.shape("square")
head.color("black")
head.penup()
head.goto(0,0)
head.direction = "right"


# Functions
def move():
    if head.direction == "up":
        y = head.ycor()
        head.sety(y + 20)

    if head.direction == "down":
        y = head.ycor()
        head.sety(y - 20)

        if head.direction == "left":
            x = head.xcor()
            head.sety(x - 20)

            if head.direction == "right":
                x = head.xcor()
                head.sety(x + 20)

# Main game loop
while True:
    wn.update()

    move()

    time.sleep(delay)

wn.mainloop()