This only halfway works in Opera [10.53 on Linux]. You can type, but then if you fill the output area, only autoscrolls down after you press Enter. But otherwise, you can't see what you're typing while you type it. And then focus goes all out of whack if you scroll the tutorial, or use up arrow and down arrow. Sometimes it accesses the readline history, sometimes it scrolls the screen, and seems somewhat arbitrary. Some of this could be blamed on the betaness of Opera, though.