Grave edge sounds and player hit sounds do not play if you are not vulnerable to them.

src/enemy.py

@@ -144,6 +144,7 @@ class Enemy(Object):
         
     def attack(self, currentTime, player):
         """Perform attack on player"""
+        if player.isInvincible: return
         self.lastAttackTime = currentTime
         # Play attack sound
         attackSound = f"{self.enemyType}_attack"