Trying to add new enemy

Enemies/Ghost_Enemy.tscn

@@ -0,0 +1,38 @@
+[gd_scene load_steps=5 format=2]
+
+[ext_resource path="res://Enemies/Ghost_Enemy.gd" type="Script" id=5]
+
+[sub_resource type="Animation" id=1]
+resource_name = "appear"
+tracks/0/type = "value"
+tracks/0/path = NodePath("Sprite:frame")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray(  ),
+"transitions": PoolRealArray(  ),
+"update": 1,
+"values": [  ]
+}
+
+[sub_resource type="Animation" id=3]
+resource_name = "idle"
+length = 4.0
+step = 0.6
+
+[sub_resource type="CircleShape2D" id=28]
+radius = 28.3009
+
+[node name="KinematicBody2D" type="KinematicBody2D"]
+script = ExtResource( 5 )
+
+[node name="AnimationPlayer" type="AnimationPlayer" parent="."]
+anims/appear = SubResource( 1 )
+anims/idle = SubResource( 3 )
+
+[node name="Sprite" type="Sprite" parent="."]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+shape = SubResource( 28 )