Up Down Ready was made by two game design students at Griffith University. It got them nominated for a bunch of Freeplay Awards just last week, including Best Australian Game and Best Technical Innovation.
And it won the award for Best Design!
Instructions are scant: all you need to do is press Up or Down depending on the situation. But the catch is, you can't rely on the controls working the same way for each microgame. In one they might move you ship to dodge obstacles; in another they might move the obstacles; in yet another they might play Dance Dance Revolution.
Up Down Ready [Kongregate]