Space invaders

import turtle
import random
import time

# Game setup
koko = 1000
turtle.bgcolor("black")
turtle.speed(0)
turtle.ht()
turtle.setundobuffer(1)
turtle.tracer(1)

# Define Sprite class
class Sprite(turtle.Turtle):
    def __init__(self, spriteshape, color, startx, starty):
        turtle.Turtle.__init__(self, shape=spriteshape)
        self.speed(0)
        self.penup()
        self.color(color)
        self.goto(startx, starty)
        self.speed = 0.1

    def move(self):
        self.fd(self.speed)

        # Boundary detection (prevents sprite from leaving screen)
        if self.xcor() > koko/2 - 10:
            self.setx(koko/2 - 10)
            self.rt(60)

        if self.xcor() < -koko/2 + 10:
            self.setx(-koko/2 + 10)
            self.rt(60)

        if self.ycor() > koko/2 - 10:
            self.sety(koko/2 - 10)
            self.rt(60)

        if self.ycor() < -koko/2 + 10:
            self.sety(-koko/2 + 10)
            self.rt(60)

# Player class inheriting Sprite
class Player(Sprite):
    def __init__(self, spriteshape, color, startx, starty):
        Sprite.__init__(self, spriteshape, color, startx, starty)
        self.speed = 3
        self.lives = 3

    def turn_left(self):
        self.lt(45)

    def turn_right(self):
        self.rt(45)

    def accelerate(self):
        if self.speed < 7:
            self.speed += 0.2

    def decelerate(self):
        if self.speed > -5:
            self.speed -= 0.2

    def shoot(self):
        bullet = Bullet("square", "yellow", self.xcor(), self.ycor())
        bullet.setheading(90)
        return bullet

# Bullet class
class Bullet(Sprite):
    def __init__(self, spriteshape, color, startx, starty):
        Sprite.__init__(self, spriteshape, color, startx, starty)
        self.speed = 10

    def move(self):
        self.fd(self.speed)

# Enemy class
class Enemy(Sprite):
    def __init__(self, spriteshape, color, startx, starty):
        Sprite.__init__(self, spriteshape, color, startx, starty)
        self.speed = 2

    def move(self):
        self.fd(self.speed)
        # Boundary check to reverse direction and move down
        if self.xcor() > koko/2 - 10 or self.xcor() < -koko/2 + 10:
            self.rt(180)
            self.sety(self.ycor() - 30)

# Game class
class Game:
    def __init__(self):
        self.level = 1
        self.score = 0
        self.state = "playing"
        self.pen = turtle.Turtle()
        self.lives = 3

    def draw_border(self):
        self.pen.speed(0)
        self.pen.color("white")
        self.pen.pensize(3)
        self.pen.penup()
        self.pen.goto(-koko/2, koko/2)
        self.pen.pendown()
        for _ in range(4):
            self.pen.fd(koko)
            self.pen.rt(90)
        self.pen.penup()
        self.pen.ht()

    def update_score(self):
        self.pen.clear()
        self.pen.color("white")
        self.pen.penup()
        self.pen.goto(-koko/2 + 10, koko/2 - 30)
        self.pen.write(f"Score: {self.score}  Lives: {self.lives}", font=("Arial", 16, "normal"))

    def game_over(self):
        self.pen.clear()
        self.pen.color("red")
        self.pen.penup()
        self.pen.goto(0, 0)
        self.pen.write("GAME OVER", align="center", font=("Arial", 24, "normal"))
        self.pen.goto(0, -30)
        self.pen.write(f"Final Score: {self.score}", align="center", font=("Arial", 16, "normal"))

# Initialize the game
game = Game()
game.draw_border()

# Create the player
player = Player("triangle", "white", 0, -koko/2 + 50)

# Create enemies
enemies = []
for _ in range(5):
    enemy = Enemy("circle", "red", random.randint(-koko//2 + 10, koko//2 - 10), random.randint(koko//2 - 50, koko//2 - 200))
    enemies.append(enemy)

# Keyboard bindings
turtle.onkey(player.turn_left, "Left")
turtle.onkey(player.turn_right, "Right")
turtle.onkey(player.accelerate, "Up")
turtle.onkey(player.decelerate, "Down")
turtle.onkey(lambda: player.shoot(), "space")
turtle.listen()

# Main game loop
bullets = []
while game.state == "playing":
    for bullet in bullets[:]:
        bullet.move()
        # Check if bullet hits an enemy
        for enemy in enemies[:]:
            if bullet.distance(enemy) < 20:
                bullet.hideturtle()
                enemy.hideturtle()
                bullets.remove(bullet)
                enemies.remove(enemy)
                game.score += 10
                break

    for enemy in enemies:
        enemy.move()

    # Check for collision between player and enemies
    for enemy in enemies[:]:
        if player.distance(enemy) < 20:
            enemy.hideturtle()
            enemies.remove(enemy)
            game.lives -= 1
            if game.lives == 0:
                game.state = "game_over"
                game.game_over()
                break

    # Update score and lives
    game.update_score()

    time.sleep(0.02)

# End of game
input("Press Enter to exit...")