Python to Space Bullet Shooter Game with Full Source Code For Beginners

A Simple Space Bullet Shooter Game.

To be Played with a Computer:

• Arrows to move up and down and left and right.
• Enter to shoot a bullet.

Required Library:

python3 -m pip install -U pygame --user
pip install random2
pip install python-math
pip install python-time
pip install mixer

Source Code:

space_bullet_shooter.py

import pygame
import random
import math
import time

from pygame import mixer


pygame.init()

clock = pygame.time.Clock()
# bg sound
mixer.music.load("bg.wav")
mixer.music.play(-1)


score_value = 0


# setting the display
screen = pygame.display.set_mode((800, 600))

# background
bg = pygame.image.load("img2.png")

icon = pygame.image.load("icond.png")
pygame.display.set_caption("Space Bullet Shooter")
# display the icon
pygame.display.set_icon(icon)


# showing the bird imageo
playeimg = pygame.image.load("pl4.png")
playerx = 370
playery = 460

playerx_change = 0


def player(x, y):
    screen.blit(playeimg, (x, y))

 # moving the playerimag
 # for this we will use cordinate movement
 # we will pass arugument to the function


# for enemy
enemyimg = []
enemyX = []
enemyY = []
enemyX_change = []
enemyY_change = []

number_of_enemy = 6
for i in range(number_of_enemy):

    enemyimg.append(pygame.image.load("ens.png"))

    enemyX.append(random.randint(0, 736))
    enemyY.append(random.randint(50, 150))
    enemyX_change.append(4)
    enemyY_change.append(30)


# bullet
bulletimg = pygame.image.load("bullet.png")
bulletX = 0
bulletY = 480
bulletX_change = 0
bulletY_change = 20
bullet_state = "ready"
# function for enemy


def enemy(x, y, i):
    screen.blit(enemyimg[i], (x, y))


# function for fire bullet

def fire_bullet(x, y):
    global bullet_state
    bullet_state = "fire"
    screen.blit(bulletimg, (x+53, y+10))


# checking if collision
def is_collision(enemyX, enemyY, playerx, playery):

    distance = math.sqrt((math.pow(enemyX-bulletX, 2)) +
                         (math.pow(enemyY-bulletY, 2)))
    if distance < 27:
        return True

    else:
        return False


# showing score

font = pygame.font.Font("freesansbold.ttf", 35)
score_cordinate_X = 10
Score_cordinate_Y = 10


def showscore(x, y):
    score = font.render("Score : " + str(score_value), True, (255, 255, 255))
    screen.blit(score, (x, y))


OVER = pygame.font.Font("freesansbold.ttf", 60)
# game over


def game_over():
    over = OVER.render("GAME OVER   ", True, (0, 0, 255))
    screen.blit(over, (250, 250))


final = pygame.font.Font("freesansbold.ttf", 50)


def final_score():
    finalscore = final.render(
        "Total Score : " + str(score_value), True, (0, 255, 0))
    screen.blit(finalscore, (280, 350))


author = pygame.font.Font("freesansbold.ttf", 16)
# showing author name


def author_name():
    subject = author.render(
        "Copyright ©2020 TheKnight All Right Reseved By TheKnight ", True, (0, 255, 0))
    screen.blit(subject, (170, 580))


# game loop
running = True

while running:
    screen.fill((0, 0, 0))
    screen.blit(bg, (0, 0))

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

        # controlling the bird by arrow keys

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                playerx_change = -5

            if event.key == pygame.K_RIGHT:
                playerx_change = 5

            if event.key == pygame.K_SPACE:
                if bullet_state == "ready":
                    bulletX = playerx
                    bulletsound = mixer.Sound("bulletout.wav")
                    bulletsound.play()

                    fire_bullet(bulletX, bulletY)

        if event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT or event.key == pygame.K_LEFT:
                playerx_change = 0

    for i in range(number_of_enemy):

        # game over
        if enemyY[i] > 440:

            for j in range(number_of_enemy):
                enemyY[j] = 2000
            game_over()
            time.sleep(2)

            final_score()

            break

        enemyX[i] += enemyX_change[i]
        if enemyX[i] <= 0:
            enemyX_change[i] = 4
            enemyY[i] += enemyY_change[i]

        elif enemyX[i] >= 736:
            enemyX_change[i] = -4
            enemyY[i] += enemyY_change[i]

        # collision

        collision = is_collision(enemyX[i], enemyY[i], bulletX, bulletY)
        if collision:
            bulletsound = mixer.Sound("bulletshoot.wav")
            bulletsound.play()
            bulletY = 480
            bullet_state = "ready"

            score_value += 1

            enemyX[i] = random.randint(0, 736)
            enemyY[i] = random.randint(50, 150)

        enemy(enemyX[i], enemyY[i], i)

    # checking boundries of spacechip
    playerx += playerx_change

    if playerx <= 0:
        playerx = 0
    elif playerx >= 730:
        playerx = 730

    # playerx -=0.2
    # playery -=.2

    # bullet movement
    if bulletY <= 0:
        bulletY = 480
        bullet_state = "ready"
    if bullet_state == "fire":
        fire_bullet(bulletX, bulletY)
        bulletY -= bulletY_change

    player(playerx, playery)
    showscore(score_cordinate_X, Score_cordinate_Y)

    author_name()

    pygame.display.update()
Code language: PHP (php)

Output:

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