Improve menuing, and convert ships to RigidBody2D for accurate positioning.

godot_ship/script/title screen/Title Screen.gd

@@ -6,17 +6,20 @@ extends Control
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
-	#$VBoxContainer/Singleplayer.grab_focus()
-	pass
+	$VBoxContainer/Singleplayer.grab_focus()
 
 func _on_Singleplayer_pressed():
 	MessageBus.emit_signal("change_scene", "Singleplayer")
-	
+	queue_free()
+
 func _on_Multiplayer_pressed():
 	MessageBus.emit_signal("change_scene", "Multiplayer")
+	queue_free()
 
 func _on_Options_pressed():
 	MessageBus.emit_signal("change_scene", "Options")
+	queue_free()
 
 func _on_Quit_pressed():
 	MessageBus.emit_signal("quit")
+	queue_free()