added l4 win condition

Enemies/Demon Boss.gd

@@ -7,7 +7,7 @@ var velocity: Vector2 = Vector2.ZERO
 var health: int = 15
 var hit: bool = false
 var counter: int = 0
-
+signal demon_boss_death
 
 func _physics_process(_delta: float) -> void:
 	velocity = Vector2.ZERO
@@ -60,6 +60,7 @@ func _on_hitbox_area_entered(area: Area2D) -> void:
 
 	if health <= 0:
 		call_deferred('queue_free')
+		emit_signal("demon_boss_death")
 	return
 
 func _on_Player_Detector__Attack_body_entered(body: Node) -> void: