diff --git a/spaceInvaderGame/alien.png b/spaceInvaderGame/alien.png
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diff --git a/spaceInvaderGame/background.wav b/spaceInvaderGame/background.wav
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diff --git a/spaceInvaderGame/bg.png b/spaceInvaderGame/bg.png
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diff --git a/spaceInvaderGame/bullet.png b/spaceInvaderGame/bullet.png
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diff --git a/spaceInvaderGame/explosion.wav b/spaceInvaderGame/explosion.wav
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diff --git a/spaceInvaderGame/laser.wav b/spaceInvaderGame/laser.wav
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diff --git a/spaceInvaderGame/main.py b/spaceInvaderGame/main.py
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--- /dev/null
+++ b/spaceInvaderGame/main.py
@@ -0,0 +1,148 @@
+import pygame
+import random
+from pygame import mixer
+
+pygame.init()
+screen = pygame.display.set_mode((800, 600))
+bg = pygame.image.load('bg.png')
+
+pygame.display.set_caption("Space Invaders")
+icon = pygame.image.load('space.png')
+pygame.display.set_icon(icon)
+
+score = 0
+font = pygame.font.Font('freesansbold.ttf', 32)
+scoreX = 15
+scoreY = 15
+
+overfont = pygame.font.Font('freesansbold.ttf', 100)
+
+mixer.music.load("background.wav")
+mixer.music.play(-1)
+# mixer.music.load("explosion.wav")
+
+playimg = pygame.image.load('si.png')
+playerX = 368
+playerY = 500
+c = 0
+d = 0
+
+enemyimg = []
+enemyX = []
+enemyY = []
+e = []
+numofenemy = 8
+for i in range(numofenemy):
+    enemyimg.append(pygame.image.load('alien.png'))
+    enemyX.append(random.randint(0, 736))
+    enemyY.append(random.randint(0, 250))
+    e.append(1.2)
+
+bulletimg = pygame.image.load('bullet.png')
+bulletX = 0
+bulletY = 480
+f = 15
+bulstate = "ready"
+
+
+def showscore():
+    scoreobj = font.render("Score: " + str(score), True, (255, 255, 255))
+    screen.blit(scoreobj, (scoreX, scoreY))
+
+
+def player():
+    screen.blit(playimg, (playerX, playerY))
+
+
+def enemy():
+    for b in range(numofenemy):
+        screen.blit(enemyimg[b], (enemyX[b], enemyY[b]))
+
+
+def bulletfire():
+    global bulstate
+    bulstate = "fire"
+    screen.blit(bulletimg, (bulletX + 16, bulletY + 10))
+
+
+def gameover():
+    overobj = overfont.render("GAME OVER", True, (255, 255, 255))
+    screen.blit(overobj, (90, 250))
+    restartobj = font.render("Press Enter to Restart", True, (255, 255, 255))
+    screen.blit(restartobj, (230, 400))
+
+
+rn = True
+while rn:
+    screen.fill((0, 0, 0))
+    screen.blit(bg, (0, 0))
+    for ev in pygame.event.get():
+        if ev.type == pygame.QUIT:
+            rn = False
+        if ev.type == pygame.KEYDOWN:
+            if ev.key == pygame.K_LEFT:
+                c = -3
+            if ev.key == pygame.K_RIGHT:
+                c = 3
+            if ev.key == pygame.K_UP:
+                d = -3
+            if ev.key == pygame.K_DOWN:
+                d = 3
+            if ev.key == pygame.K_SPACE and bulstate == "ready":
+                bulletsound = mixer.Sound('laser.wav')
+                bulletsound.play()
+                bulletX = playerX
+                bulletY = playerY
+                bulletfire()
+            if ev.key == pygame.K_RETURN and enemyY[0] == 2000:
+                score = 0
+                enemyY = []
+                for i in range(numofenemy):
+                    enemyY.append(random.randint(0, 250))
+
+        if ev.type == pygame.KEYUP:
+            if ev.key == pygame.K_LEFT or ev.key == pygame.K_RIGHT:
+                c = 0
+            if ev.key == pygame.K_UP or ev.key == pygame.K_DOWN:
+                d = 0
+    playerX += c
+    if playerX > 736:
+        playerX = 736
+    elif playerX < 0:
+        playerX = 0
+    playerY += d
+    if playerY > 536:
+        playerY = 536
+    elif playerY < 0:
+        playerY = 0
+    player()
+    enemy()
+
+    for i in range(numofenemy):
+        enemyX[i] += e[i]
+        if enemyX[i] > 736 or enemyX[i] < 0:
+            e[i] = -e[i]
+            enemyY[i] += 40
+        if enemyY[i] > 420 or (abs(enemyX[i] - playerX) < 22 and abs(enemyY[i] - playerY) < 22):
+            for j in range(numofenemy):
+                enemyY[j] = 2000
+            gameover()
+            break
+
+    if bulstate == "fire":
+        bulletY -= f
+        bulletfire()
+
+    if bulletY < 0:
+        bulstate = "ready"
+
+    for i in range(numofenemy):
+        if abs(enemyX[i] - bulletX) < 20 and abs(enemyY[i] - bulletY) < 20:
+            scoresound = mixer.Sound('explosion.wav')
+            scoresound.play()
+            bulstate = "ready"
+            score += 1
+            enemyX[i] = random.randint(0, 736)
+            enemyY[i] = random.randint(0, 350)
+    showscore()
+    pygame.display.update()
diff --git a/spaceInvaderGame/requirements.txt b/spaceInvaderGame/requirements.txt
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--- /dev/null
+++ b/spaceInvaderGame/requirements.txt
@@ -0,0 +1 @@
+pygame==2.1.2
diff --git a/spaceInvaderGame/si.png b/spaceInvaderGame/si.png
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diff --git a/spaceInvaderGame/space.png b/spaceInvaderGame/space.png
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