Space Invaders.py

import turtle
import random
import winsound

# variables
playing = True
state = "play"
level = 0
playerSpeed = 25
bulletSpeed = 25
bulletDelay = 3
alienDX = 25
alienDY = 25
playerHealth = 50
currentBulletDelay = bulletDelay
enemyBulletDelay = 10
gameTimerDelay = 20
playerpic = "Player.gif"
alien1 = "Alien 1.gif"
alien2 = "Alien 2.gif"
alien3 = "Alien 3.gif"
alien4 = "Alien 4.gif"
alien5 = "Alien 5.gif"
alien6 = "Alien 6.gif"
playerBullets = []
spawnedEnemies = []
enemyBullets = []

levelenemies = [
    [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], # level 1
    [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1], # level 2
    [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1], # level 3
    [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1], # level 4
    [5, 5, 5, 4, 4, 5, 5, 3, 3, 4, 4, 5, 5, 3, 4], # level 5
    [6, 6, 6, 5, 5, 5, 5, 4, 3, 4, 4, 5, 6 ,2 ,1] # level 6
]



# screen
wn = turtle.Screen()
wn.title("Space Invaders")
wn.bgcolor("black")
wn.setup(width=600, height=800)
wn.addshape(playerpic)
wn.addshape(alien1)
wn.addshape(alien2)
wn.addshape(alien3)
wn.addshape(alien4)
wn.addshape(alien5)
wn.addshape(alien6)

# Player
player = turtle.Turtle()
player.speed(0)
player.shape(playerpic)
player.color("red")
player.penup()
player.sety(-350)

# pen
pen = turtle.Turtle()
pen.speed(0)
pen.penup()
pen.hideturtle()
pen.goto(0, 0)


# Functions
def PlayerMoveLeft():
    if state == "play":
        x = player.xcor()
        x -= playerSpeed
        if x < -300:
            x = -300
        player.setx(x)


def PlayerMoveRight():
    if state == "play":
        x = player.xcor()
        x += playerSpeed
        if x > 300:
            x = 300
        player.setx(x)


def SpawnPlayerBullet():
    global currentBulletDelay
    if state == "play":
        if currentBulletDelay > bulletDelay:
            winsound.PlaySound("playerLaser.wav", winsound.SND_ASYNC)
            currentBulletDelay = 0
            newbullet = turtle.Turtle()
            newbullet.penup()
            newbullet.setx(player.xcor())
            newbullet.sety(player.ycor() + 10)
            newbullet.speed(0)
            newbullet.shape("circle")
            newbullet.color("white")
            newbullet.shapesize(stretch_wid=0.2, stretch_len=0.2)
            playerBullets.append(newbullet)


def SpawnLevelEnemies(levelNumber):
    aliensToSpawn = levelenemies[levelNumber]
    i = 0
    for y in range(3):
        for x in range(5):
            newalien = turtle.Turtle()
            newalien.penup()
            newalien.setpos(x * 50 - 100, y * -50 + 350)
            newalien.speed(0)
            newalien.shape("Alien {}.gif".format(aliensToSpawn[i]))
            newalien.color("red")
            newalien.hp = aliensToSpawn[i]
            spawnedEnemies.append(newalien)
            i += 1


def SpawnEnemyBullet(x, y):
    global enemyBulletDelay
    if enemyBulletDelay > 5:
        winsound.PlaySound("alienLasers.wav", winsound.SND_ASYNC)
        enemyBulletDelay = 0
        newbullet = turtle.Turtle()
        newbullet.penup()
        newbullet.setx(x)
        newbullet.sety(y)
        newbullet.speed(0)
        newbullet.shape("circle")
        newbullet.color("red")
        newbullet.shapesize(stretch_wid=0.2, stretch_len=0.2)
        enemyBullets.append(newbullet)



wn.listen()
wn.onkeypress(PlayerMoveLeft, "a")
wn.onkeypress(PlayerMoveRight, "s")
wn.onkeypress(SpawnPlayerBullet, "space")
SpawnLevelEnemies(level)
while playing:
    wn.update()
    currentBulletDelay += 1
    enemyBulletDelay += 1

    # if the game is in play mode
    if state == "play":
        # move bullets
        for bullet in playerBullets:
            y = bullet.ycor()
            y += bulletSpeed
            bullet.sety(y)
            if y >= 400:
                # remove bullet
                playerBullets.remove(bullet)
                bullet.reset()

        for bullet in enemyBullets:
            y = bullet.ycor()
            y -= bulletSpeed
            bullet.sety(y)
            if y <= -400:
                # remove bullet
                enemyBullets.remove(bullet)
                bullet.reset()

        i = random.randrange(0, len(spawnedEnemies))
        selectedEnemy = spawnedEnemies[i]
        SpawnEnemyBullet(selectedEnemy.xcor(), selectedEnemy.ycor())
        # move all aliens to the side
        edge = False
        for alien in spawnedEnemies:
            x = alien.xcor()
            x += alienDX
            if x <= -250 or x >= 250:
                edge = True

            alien.setx(x)
        # if an alien hits the edge. Move all aliens down and reverse direction
        if edge:
            alienDX *= -1
            for alien in spawnedEnemies:
                y = alien.ycor()
                y -= alienDY
                alien.sety(y)
                # if an alien reaches the bottom of the screen then game over
                if y <= -380:
                    state = "lose"
                    pen.color("red")

                    pen.write("GAMEOVER", align="center", font=("Courier", 50, "normal"))

        # compare bullet position to enemies
        for alien in spawnedEnemies:
            for bullet in playerBullets:
                if alien.xcor() - 20 < bullet.xcor() < alien.xcor() +20 and alien.ycor() - 20 < bullet.ycor() < alien.ycor() + 20:

                    playerBullets.remove(bullet)
                    bullet.reset()
                    bullet.clear()
                    bullet.hideturtle()
                    alien.hp -= 1
                    if alien.hp == 0:
                        winsound.PlaySound("alienExplosion.wav", winsound.SND_ASYNC)
                        if spawnedEnemies.__contains__(alien):
                            spawnedEnemies.remove(alien)
                        alien.reset()
                        alien.clear()
                        alien.hideturtle()
                    else:
                        winsound.PlaySound("hitHurt.wav", winsound.SND_ASYNC)

        # compare enemy bullet to player
        for bullet in enemyBullets:
            if player.xcor()-20 < bullet.xcor() < player.xcor() + 20 and -350 < bullet.ycor() < -340:
                winsound.PlaySound("playerExplosion.wav", winsound.SND_NOWAIT)
                state = "lose"

                pen.color("red")

                pen.write("YOU DIED", align="center", font=("Courier", 30, "normal"))
                winsound.PlaySound("You Lose.wav", winsound.SND_NOWAIT)
        # if all enemies are dead
        if len(spawnedEnemies) == 0:
            state = "win"
            pen.color("green")
            pen.write("YOU WIN", align="center", font=("Courier", 30, "normal"))

    if state == "win":
        gameTimerDelay -= 1
        if gameTimerDelay <= 0:
            level += 1
            if level == len(levelenemies):
                playing = False
                winsound.PlaySound("You Win.wav", winsound.SND_NOWAIT)
            else:
                winsound.PlaySound("Level Transition.wav", winsound.SND_ASYNC)
                for bullet in enemyBullets:
                    bullet.reset()
                    bullet.clear()
                    bullet.hideturtle()
                for bullet in playerBullets:
                    bullet.reset()
                    bullet.clear()
                    bullet.hideturtle()
                pen.clear()
                pen.write("Level {}".format(level + 1), align="center", font=("Courier", 30, "normal"))
                enemyBullets = []
                playerBullets = []

                SpawnLevelEnemies(level)
                state = "play"
                pen.clear()
                gameTimerDelay = 20

    if state == "lose":
        gameTimerDelay -= 2
        if gameTimerDelay <= 0:
            playing = False