def _check_game_over(self):
userWon, canMove = self._check_tiles()
won = newHighScore = None
if userWon:
won = True
if self.score > self.highScore:
self.highScore = self.score
newHighScore = True
elif not canMove:
won = newHighScore = False
if won is not None:
GameOver.Window(self, self.score, won, newHighScore)
self.new_game()
else:
self.update_score()
