Slight UI tweaks; Some Fish Cascade Fixes

scenes/objects/game/fish.gd

@@ -2,13 +2,18 @@ extends Node2D
 
 var speed = 100
 var scene
+var active = true
+var self_active = true
 
 func _ready() -> void:
 	scene = self.get_parent()
 	
 func _process(delta: float) -> void:
-	self.position.y += speed*delta
+	active = scene.active
 	
-	if self.position.y >= 720:
-		scene.fishs.erase(self)
-		self.queue_free()
+	if active and self_active:
+		self.position.y += speed*delta
+		
+		if self.position.y >= get_viewport_rect().size.y:
+			scene.fishs.erase(self)
+			self.queue_free()