update

scenes/enemy/init.gd

@@ -0,0 +1,30 @@
+extends CharacterBody3D
+
+@export var stats: EnemyStats
+
+var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
+
+func _ready() -> void:
+  add_to_group("enemies")
+  if is_in_group("boss"):
+    BossData.register(self, stats)
+    BossData.set_stat(self, "spawn_position", global_position)
+  else:
+    EnemyData.register(self, stats)
+    EnemyData.set_stat(self, "spawn_position", global_position)
+  EventBus.entity_died.connect(_on_entity_died)
+
+func _exit_tree() -> void:
+  if is_in_group("boss"):
+    BossData.deregister(self)
+  else:
+    EnemyData.deregister(self)
+
+func _on_entity_died(entity: Node) -> void:
+  if entity == self:
+    queue_free()
+
+func _physics_process(delta: float) -> void:
+  if not is_on_floor():
+    velocity.y -= gravity * delta
+  move_and_slide()