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.gd

@@ -0,0 +1,27 @@
+extends KinematicBody2D
+
+const SPEED: int = 50
+
+var player: KinematicBody2D = null
+var velocity: Vector2 = Vector2.ZERO
+
+
+func _physics_process(_delta: float) -> void:
+    velocity = Vector2.ZERO
+
+    if player:
+        velocity = position.direction_to(player.position).normalized() * SPEED
+
+    velocity = move_and_slide(velocity)
+    return
+
+
+func _on_player_detector_area_entered(area: Area2D) -> void:
+    if area.get_parent().name == 'Player':
+        player = area.get_parent()
+    return
+
+
+func _on_player_detector_area_exited(_area: Area2D):
+    player = null
+    return

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"]