This is old - you can find more recent stuff at the top of the games
Conan O'brien the Barbarian whacks things with his giant head.
Really, that's all he does for the entire game
] Walk around.
] Headbutt. (Even in mid-air.)
] Duck. (Makes you invincible. Even in mid-air.)
Ducking stops your movement, so don't do it over a pit.
] optins / quit / skip levels
This is less of a game, and more of a joke that goes on too long.
I thought of this at 4am and proceeded to create this "game" during my first week of College. (there wasn't a lot to do yet)