Code for Game

#Vooperia Invader
#Original Code by Christian Thompson
#Edits by Eric Pham

import turtle
import os
import math
import random
import tkinter as tk

n=-200
p=-200
g=200
r=200
j=200
d=0

a=0

#Set up the screen
wn = turtle.Screen()
wn.bgcolor("black")
wn.title("Vooperia Invaders")
wn.bgpic("VooperiaBackground.png")

#Play Music
os.system("afplay Vooperian_Anthem.mp3&")

#Register the shapes
turtle.register_shape("Yam.gif")
turtle.register_shape("SpikeDab.gif")
turtle.register_shape("potato.gif")

#Set the score to 0
score = 0

#Draw the score
score_pen = turtle.Turtle()
score_pen.speed(0)
score_pen.color("white")
score_pen.penup()
score_pen.setposition(-290, 280)
scorestring = "Score: %s" %score
score_pen.write(scorestring, False, align="left", font=("Arial", 14, "normal"))
score_pen.hideturtle()

#Create the player turtle
player = turtle.Turtle()
player.color("blue")
player.shape("SpikeDab.gif")
player.penup()
player.speed(0)
player.setposition(0, -250)
player.setheading(90)

playerspeed = 15

#Choose a number of enemies
number_of_enemies = 23
#Create an empty list of enemies
enemies = []

#Add enemies to list
for i in range(number_of_enemies):
    #Create the enemy
    enemies.append(turtle.Turtle())

for enemy in enemies:
    enemy.color("red")
    enemy.shape("Yam.gif")
    enemy.penup()
    enemy.speed(0)
    d= d+1
    if d % 6==0:
        n=p
        j= r-(10*d)
        g=j
        x = n
        y = g
        enemy.setposition(x, y)
    else:
        x = n
        y = g
    enemy.setposition(x, y)
    n= n+80


enemyspeed = 2



#Create the player's bullet
bullet = turtle.Turtle()
bullet.color("yellow")
bullet.shape("potato.gif")
bullet.penup()
bullet.speed(0)
bullet.setheading(90)
bullet.shapesize(0.5, 0.5)
bullet.hideturtle()

bulletspeed = 25

#Define bullet state
#ready - ready to fire
#fire - bullet is firing
bulletstate = "ready"

#Move the player left and right
def move_left():
    x = player.xcor()
    x -= playerspeed
    if x < -280:
        x = - 280
    player.setx(x)

def move_right():
    x = player.xcor()
    x += playerspeed
    if x > 280:
        x = 280
    player.setx(x)

def fire_bullet():
    #Declare bulletstate as a global if it needs changed
    global bulletstate
    if bulletstate == "ready":
        os.system("afplay laser.wav&")
        bulletstate = "fire"
        #Move the bullet to the just above the player
        x = player.xcor()
        y = player.ycor() +10
        bullet.setposition(x, y)
        bullet.showturtle()

def isCollision(t1, t2):
    distance = math.sqrt(math.pow(t1.xcor()-t2.xcor(),2)+math.pow(t1.ycor()-t2.ycor(),2))
    if distance < 25:
            return True
    else:
            return False

def mute():
    os.system("killall afplay")

#Create keyboard bindings
turtle.listen()
turtle.onkey(move_left, "Left")
turtle.onkey(move_right, "Right")
turtle.onkey(fire_bullet, "space")

while True:
    m = input("\n")
    if (m =='enter'):
        a=1+a
    else:
        continue
#Main game loop
while True:
    char = input("\n")
    if a==0:
        break
    else:
        continue

    for enemy in enemies:
        #Move the enemy
        x = enemy.xcor()
        x += enemyspeed
        enemy.setx(x)

        #Move the enemy back and down
        if enemy.xcor() > 280:
            for e in enemies:
                y = e.ycor()
                y -= 40
                e.sety(y)
            enemyspeed *= -1

        if enemy.xcor() < -280:
            for e in enemies:
                y = e.ycor()
                y -= 40
                e.sety(y)
            enemyspeed *= -1

        #Check for a collision between the bullet and the enemy
        if isCollision(bullet, enemy):
            os.system("afplay WilhelmScream.wav&")
            #Reset the bullet
            bullet.hideturtle()
            bulletstate = "ready"
            bullet.setposition(0, -400)
            #Reset the enemy
            enemies.remove(enemy)
            enemy.hideturtle()
            #Update the score
            score += 10
            scorestring = "Score: %s" %score
            score_pen.clear()
            score_pen.write(scorestring, False, align="left", font=("Arial", 14, "normal"))


        if isCollision(player, enemy):
            os.system("afplay OOF.wav&")
            player.hideturtle()
            enemy.hideturtle()
            print("Game Over")
            score_pen.setposition(-300, 0)
            scorestring = "YOU LOSE"
            os.system("killall afplay")
            score_pen.write(scorestring, False, align="left", font=("Arial", 100, "normal"))
            score_pen.hideturtle()
            turtle.done()
            break

        if score == 230:
            print("YOU WON!")
            score_pen.setposition(-300, 0)
            scorestring = "YOU WON!"
            score_pen.write(scorestring, False, align="left", font=("Arial", 100, "normal"))
            score_pen.hideturtle()
            os.system("killall afplay")
            turtle.done()
            break

        if (char == 'ESC'):
            mute()

    #Move the bullet
    if bulletstate == "fire":
        y = bullet.ycor()
        y += bulletspeed
        bullet.sety(y)

    #Check to see if the bullet has gone to the top
    if bullet.ycor() > 275:
        bullet.hideturtle()
        bulletstate = "ready"