diff --git a/classes/Sound.py b/classes/Sound.py
index 1bf7d260..3affb798 100644
--- a/classes/Sound.py
+++ b/classes/Sound.py
@@ -20,6 +20,7 @@ def __init__(self):
         self.brick_bump = mixer.Sound("./sfx/brick-bump.ogg")
         self.powerup = mixer.Sound('./sfx/powerup.ogg')
         self.powerup_appear = mixer.Sound('./sfx/powerup_appears.ogg')
+        self.pipe = mixer.Sound('./sfx/pipe.ogg')
 
     def play_sfx(self, sfx):
         if self.allowSFX:
diff --git a/entities/Koopa.py b/entities/Koopa.py
index 3e05b252..387739b1 100644
--- a/entities/Koopa.py
+++ b/entities/Koopa.py
@@ -38,8 +38,6 @@ def update(self, camera):
             self.checkEntityCollision()
         elif self.alive == "shellBouncing":
             self.shellBouncing(camera)
-        elif self.alive is False:
-            self.die(camera)
 
     def drawKoopa(self, camera):
         if self.leftrightTrait.direction == -1:
@@ -59,33 +57,6 @@ def shellBouncing(self, camera):
         self.drawKoopa(camera)
         self.leftrightTrait.update()
 
-    def die(self, camera):
-        if self.timer == 0:
-            self.textPos = Vec2D(self.rect.x + 3, self.rect.y - 32)
-        if self.timer < self.timeAfterDeath:
-            self.textPos.y += -0.5
-            self.textPos = Vec2D(self.rect.x + 3, self.rect.y - 32)
-            self.dashboard.drawText("100", self.textPos.x + camera.x, self.textPos.y, 8)
-            self.vel.y -= 0.5
-            self.rect.y += self.vel.y
-            self.screen.blit(
-                self.spriteCollection.get("koopa-hiding").image,
-                (self.rect.x + camera.x, self.rect.y - 32),
-            )
-        else:
-            self.vel.y += 0.3
-            self.rect.y += self.vel.y
-            self.textPos.y += -0.5
-            self.dashboard.drawText("100", self.textPos.x + camera.x, self.textPos.y, 8)
-            self.screen.blit(
-                self.spriteCollection.get("koopa-hiding").image,
-                (self.rect.x + camera.x, self.rect.y - 32),
-            )
-            if self.timer > 500:
-                # delete entity
-                self.alive = None
-        self.timer += 6
-
     def sleepingInShell(self, camera):
         if self.timer < self.timeAfterDeath:
             self.screen.blit(
diff --git a/entities/Mario.py b/entities/Mario.py
index 5a37acef..65752458 100644
--- a/entities/Mario.py
+++ b/entities/Mario.py
@@ -99,7 +99,7 @@ def _onCollisionWithBlock(self, block):
         block.triggered = True
 
     def _onCollisionWithMob(self, mob, collisionState):
-        if isinstance(mob, RedMushroom):
+        if isinstance(mob, RedMushroom) and mob.alive:
             self.powerup(1)
             self.killEntity(mob)
             self.sound.play_sfx(self.sound.powerup)
@@ -133,6 +133,7 @@ def _onCollisionWithMob(self, mob, collisionState):
                 x, y = self.rect.x, self.rect.y
                 self.rect = pygame.Rect(x, y + 32, 32, 32)
                 self.invincibilityFrames = 60
+                self.sound.play_sfx(self.sound.pipe)
 
     def bounce(self):
         self.traits["bounceTrait"].jump = True
diff --git a/entities/Mushroom.py b/entities/Mushroom.py
index 2088d836..60d04734 100644
--- a/entities/Mushroom.py
+++ b/entities/Mushroom.py
@@ -54,13 +54,4 @@ def movePointsTextUpAndDraw(self, camera):
         self.dashboard.drawText("100", self.textPos.x + camera.x, self.textPos.y, 8)
 
     def checkEntityCollision(self):
-        for ent in self.levelObj.entityList:
-            collisionState = self.EntityCollider.check(ent)
-            if collisionState.isColliding:
-                if ent.type == "Mob":
-                    self._onCollisionWithMob(ent, collisionState)
-
-    def _onCollisionWithMob(self, mob, collisionState):
-        if collisionState.isColliding and mob.alive == "shellBouncing":
-            self.alive = False
-            self.sound.play_sfx(self.sound.brick_bump)
+        pass
diff --git a/sfx/pipe.ogg b/sfx/pipe.ogg
new file mode 100644
index 00000000..e3396e78
Binary files /dev/null and b/sfx/pipe.ogg differ