Updated enemy bullet to correctly instantiate.

enemy.tscn

@@ -114,6 +114,18 @@ tracks/1/keys = {
 "update": 1,
 "values": [ExtResource("3_qi2p4")]
 }
+tracks/2/type = "value"
+tracks/2/imported = false
+tracks/2/enabled = true
+tracks/2/path = NodePath("Sprite2D:hframes")
+tracks/2/interp = 1
+tracks/2/loop_wrap = true
+tracks/2/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 1,
+"values": [6]
+}
 
 [sub_resource type="AnimationLibrary" id="AnimationLibrary_3yqyl"]
 _data = {

enemy_bullet.gd

@@ -1,5 +1,13 @@
 extends Area2D
 
+@export var speed = 150
+
+func start(pos):
+    position = pos
+
+func _process(delta):
+    position.y += speed * delta
+
 func _on_visible_on_screen_notifier_2d_screen_exited():
     queue_free()