Chip's Challenge, if you've never heard of the game somehow, was packed in with a lot of computers during the 16-bit Windows heyday. It developed a kind of a strong following somehow. I stars you, as Chip, who has to run around a series of levels avoiding enemies, collecting things, and searching for the exit.
But let's say that you're playing a level and you get stuck or lazy or both. You could hold down the left CTRL + ALT buttons and type the (faux) word "QWERTY".
Done right, you'll now be able to hit CTRL + N to go to the next level!
You can only skip the first 144(!) levels this way, number 145 wants a password (which is pretty easy to find online) or you could try to finish the level to see the credits. After that, you can CTRL + N your way through the end of the game.
Making the thing last just a couple of minutes.