add boss enemy and refactor

scripts/slime.gd

@@ -1,12 +1,14 @@
 extends CharacterBody2D
 
 @export var speed = 60
+@export var hp = 1
 
 var direction = 1
 
 @onready var ray_cast_right: RayCast2D = $RayCastRight
 @onready var ray_cast_left: RayCast2D = $RayCastLeft
 @onready var animated_sprite: AnimatedSprite2D = $AnimatedSprite2D
+@onready var animation_player: AnimationPlayer = $AnimationPlayer
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _physics_process(delta: float) -> void:
@@ -25,3 +27,10 @@ func _physics_process(delta: float) -> void:
 	position.x += direction * speed * delta
 	
 	move_and_slide()
+
+func _on_hit_box_hit() -> void:
+	hp -= 1
+	
+	if hp <= 0:
+		animated_sprite.play("die")
+		animation_player.play("die")