DTT  There was a bug where scores were not being uploaded for some players but that was fixed with the latest version of the game.

The high score from the player in Japan is real. None of the scores are inflated or inaccurate. There really are people that good at the game who know how to optimize their scoring while doing amazingly fast line clears.

As another person commented, you can pause the game with the Escape key or any other key you assign to Pause.  
(Version 1.0)