add boss enemy and refactor

scripts/boss.gd

@@ -0,0 +1,45 @@
+extends CharacterBody2D
+
+@export var speed = 60
+@export var hp = 2
+
+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
+@onready var hurt_sound: AudioStreamPlayer2D = $Hurt
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _physics_process(delta: float) -> void:
+	# Apply gravity
+	if not is_on_floor():
+		velocity += get_gravity() * delta
+	
+	if ray_cast_right.is_colliding():
+		direction = -1
+		animated_sprite.flip_h = true
+	
+	if ray_cast_left.is_colliding():
+		direction = 1
+		animated_sprite.flip_h = false
+
+	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")
+	else:
+		hurt_sound.play()
+		animated_sprite.play("hurt")
+
+
+func _on_animated_sprite_2d_animation_finished() -> void:
+	animated_sprite.play("default")