http://max.45.kg/ycc/esc.html
One of the most difficult three-screen point and click games you'll
ever play. Made by Japanese programmer YCC, Esc reaches deep for
logic puzzles that are laughably obvious -- once you toil over
their answer for half an hour. If you don't beat the game in ten
minutes, say goodbye to the rest of your afternoon.
The game takes place in what appears to be a small three-room
prison cell. On the left is a small cabinet with two drawers, on
the right is a table and chair. In the center is a big steel door
locked with a fancy looking number pad and screen. And... that's
it. There's only one clue to kick things off: a notepad on the
desk. Good luck.