Tetris again

I love this game. I can't really say why. I mean all you're doing is just placing the little blocks next to the other little blocks to make them go away. Nothing blows up, the graphics are plain, and everything comes from the top, down. A simple concept, but hard to put down. I've tried playing other games on Nintendo 64 and Gameboy but I always come back to Tetris. I imagine it's because it's easy to play. You don't have to worry about any special moves and there's only one button you have to push to change the direction of the falling blocks. Anyone can play this game, it's great.