I didn't like the name I used when I first started the game. After I changed it everything disappeared. It seems the game deleted my entire game-- two weeks of solid play -- without warning. I can't find any way to enter the game with my old name and recover.

Is there any way to recover my old name & game? I tried changing my name back, but it doesn't work!

Unfortunately your game was deleted when you clicked on the "Delete" button. Unless you had a backup of your savegame file, or you can use an 'undelete' utility, there is no way to retrieve it. It would be nice if there was a confirmation dialog ("Are you sure you want to delete this game?"), but there isn't.