You've unlocked the secret dwarf fortress game mode. Don't tell anyone how you did it, it's a secret.
Lol.
If you want to switch back to normal mode though, I'd recommend that you uninstall and re-install the game, and try running it as an administrator. For the devs to give you any real advice though I'm sure they could use information on what operating system you're using, graphics card, and if your computer can like run opengl or whatnot.
