Code cleanup, added more functionality. Floating coffins that spawn items, graves can spawn zombies, etc.

src/projectile.py

@@ -0,0 +1,29 @@
+class Projectile:
+    def __init__(self, projectile_type, start_x, direction):
+        self.type = projectile_type
+        self.x = start_x
+        self.direction = direction
+        self.speed = 0.2  # Projectiles move faster than player
+        self.isActive = True
+        self.damage = 5  # All projectiles do same damage for now
+        self.range = 10  # Maximum travel distance in tiles
+        self.start_x = start_x
+        
+    def update(self):
+        """Update projectile position and check if it should still exist"""
+        if not self.isActive:
+            return False
+            
+        self.x += self.direction * self.speed
+        
+        # Check if projectile has gone too far
+        if abs(self.x - self.start_x) > self.range:
+            self.isActive = False
+            return False
+            
+        return True
+        
+    def hit_enemy(self, enemy):
+        """Handle hitting an enemy"""
+        enemy.take_damage(self.damage)
+        self.isActive = False  # Projectile is destroyed on hit