Added locked barriers and a new ghost enemy

Levels/Interactables/Silver Barrier.gd

@@ -0,0 +1,23 @@
+extends StaticBody2D
+
+export var alignment: String = 'V'
+
+
+func _ready() -> void:
+    if not alignment in ['V', 'H']:
+        print('Silver Barrier rotation needs to be "V" or "H"')
+    elif alignment == 'H':
+        rotation_degrees = 90
+    return
+
+
+func _on_unlock_body_entered(body: Node) -> void:
+    if not 'player' in body.get_groups():
+        return
+
+    if body.has_item('Silver Key'):
+        body.remove_item('Silver Key')
+        $Sprite.animation = 'open'
+        $Collision.set_deferred('disabled', true)
+        $Unlock.set_deferred('monitoring', false)
+    return