Had a bug where the screen scrolled down without me and it decided I won after only a few attempts. Played through and won legitimately after a while. Fun game.
I have a bit of advice for all idle game players. The current version of flash only runs if the flash object is visible on the screen. The game will even stop if you scroll it off the page while posting a comment. if you want to do something else while running an idle game do it windowed and make sure at least a small sliver of the flash game is showing on the screen. Specific to Idle Mine is this, if you have the game open but not on the screen you don't even get your $ from the idle power upgrade. You are better off closing the game completely if you can keep it showing on screen.
 "Dig To China"){kind=icon}
 "Idle Mine"){kind=icon}