Added win condition for level 1 and added boss fight for level 5

Enemies/Dark Matter.gd

@@ -1,5 +1,6 @@
 extends KinematicBody2D
 
+signal death
 # Declare member variables here. Examples:
 # var a = 2
 # var b = "text"
@@ -55,7 +56,7 @@ func _on_Star_detect_body_entered(body_star):
         #print("timer start")
 
 func _on_Star_detect_body_exited(_body):
-    #if _body.name == 'Star': 
+    #if _body.name == 'Star':
         #print("obstacle exited")
     #if _body.name == 'Obstacle':
     #obstacle = null
@@ -74,5 +75,6 @@ func _on_Hitbox_area_entered(area: Area2D):
             health -= 2
 
     if health <= 0:
+        emit_signal('death')
         call_deferred('queue_free')
     return