I figured out my game idea!

“You race to the computer room, but you’re too late: the launch sequence for the nuclear missiles has already been initiated! As the numbers count down on the screen, you randomly try pressing buttons. And there, miracle! The computer responds.

To win, you have to hack the system to prevent global thermonuclear war.

Oh, there’s one little bug: the screen doesn’t scroll. Once you get to the bottom, you’re stuck and that’s the end of it. You only have one screen.

Good luck!”

OK, now wish me luck for actually making the game…