Set up new signals in EventBus; preparing to restructure game start

code.

enemy.gd

@@ -4,6 +4,8 @@ var bullet_scene = preload("res://enemy_bullet.tscn")
 var start_pos = Vector2.ZERO
 var speed = 0
 
+var exploding = false
+
 @onready var screensize  = get_viewport_rect().size
 
 func start(pos):
@@ -36,6 +38,8 @@ func _process(delta):
 
 
 func explode():
+    if exploding: return
+    exploding = true
     print_debug("Enemy explode!")
     speed = 0
     $AnimationPlayer.play("explode")