That "Play Desktop Dungeons – Beta!" link right above the game killed my game, as did accidentally pushing the "back" button on my mouse. It would be appreciated if confirmation for leaving the page was added.
What, like one of those Javascript popups? ... I actually have no idea how to do that, because I'd have to do it in the site and not the game. A bit too focused on Unity right now, my head is.
I don't have much to add, except that those back buttons on the mouse are terrible. I also hate the keyboards with a little power switch between the arrow keys and delete button. (I had to pull the darn thing off.)
It seems that the confirmation box isn't appearing for me anymore. I tested it in Google Chrome and Safari. It might've been due that incident where the game was rolled back to a previous version.