Something I did a while ago and only just got around to putting on here.
Instructions are included in the game but I'll write them anyway.
Left/Right - Move
Up - Rotate
Space - Drop the piece down
NOTE: Some people have complained about the intro repeating. This only happens to some people, just right click and choose 'Forward' to skip it.
Can also be played here: http://www.deviantart.com/view/32055765/