Mark input as handled when a player is created

Hub.gd

@@ -44,3 +44,5 @@ func _unhandled_input(event):
 					player.position = Vector2(id * 100.0, 0.0)
 					player.modulate = playerColors[id]
 					add_child(player)
+
+					get_tree().set_input_as_handled()