Fun Retro Dungeon Crawler Made In 48 Hours
If you like your games old school and pixelated, then you will love this surprisingly difficult dungeon crawler created in under 48 hours by Minecraft creator Markus "Notch" Persson. It hearkens back to the days when games came without explanation, where you had to stumble around to figure out what's going on, and the simple style masked a devilishly difficult puzzle element. It's fun, quirky, and can be played for free if you follow the link. Now get busy punching some bats and eyeballs!
Link -via Joystiq
You're not missing anything though. It's like the original Wolfenstein only way less fun. The "head bob" will make most everyone nauseous after a while. That is why later games had the option to turn it off.
the arrow keys move from new game to instructions to about...but nothing happens after that.