Added pause capability to all levels, added music to Level 5, added a simple chasing AI to the glowing ghosts, and optimized the Main Menu scene

Enemies/Glowing Ghost.tscn

@@ -1,16 +1,20 @@
-[gd_scene load_steps=5 format=2]
+[gd_scene load_steps=7 format=2]
 
 [ext_resource path="res://Resources/Level_5_Enemy_Glowing_Ghost_Occluder.tres" type="OccluderPolygon2D" id=1]
 [ext_resource path="res://Sprites/Assets/Light.png" type="Texture" id=2]
 [ext_resource path="res://Sprites/Enemies/Glowing_Ghost.png" type="Texture" id=3]
+[ext_resource path="res://Enemies/Glowing Ghost.gd" type="Script" id=4]
 
 [sub_resource type="CapsuleShape2D" id=1]
 radius = 3.0
 height = 2.0
 
+[sub_resource type="CircleShape2D" id=2]
+radius = 50.0
+
 [node name="Glowing Ghost" type="KinematicBody2D" groups=["enemies"]]
 collision_layer = 2
-collision_mask = 0
+script = ExtResource( 4 )
 
 [node name="Sprite" type="Sprite" parent="."]
 light_mask = 4
@@ -22,6 +26,16 @@ visible = false
 position = Vector2( 0, -3 )
 shape = SubResource( 1 )
 
+[node name="Player Detector" type="Area2D" parent="."]
+collision_layer = 0
+collision_mask = 2
+input_pickable = false
+monitorable = false
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Player Detector"]
+visible = false
+shape = SubResource( 2 )
+
 [node name="Light2D" type="Light2D" parent="."]
 scale = Vector2( 0.5, 0.5 )
 texture = ExtResource( 2 )
@@ -38,3 +52,6 @@ range_item_cull_mask = 4
 [node name="LightOccluder2D" type="LightOccluder2D" parent="."]
 show_behind_parent = true
 occluder = ExtResource( 1 )
+
+[connection signal="area_entered" from="Player Detector" to="." method="_on_player_detector_area_entered"]
+[connection signal="area_exited" from="Player Detector" to="." method="_on_player_detector_area_exited"]