If you have an Amazon Kindle and you didn't already know it, go get your Kindle and try it out like now. When on home screen, press SHIFT (the up arrow key ↑) + ALT + M and voila - there's the hidden Minesweeper. Use joystick to explore and "m" to mark/unmark mines. And if you hit "g" you could play GoMoku. I had never heard of GoMoku and simply explained it's Tic-Tac-Toe but you need 5 consecutive rows to win.
Minesweeper on Kindle
More on the under the hood working of Kindle here