Must...stop...playing...Lumines!

First there was Tetris, the falling block game that sold millions of Nintendo GameBoys. Now on the Sony PSP, there's Lumines, which for me is probably ten times more addictive. Why? Well, it has asian-y techno music that responds to how you play. It has motion graphics going on in the background and different "skins", which like the music you can unlock as you play more. But mostly it just taps into your brain, reprograms it to want to create squares of color, and derive waves of pleasure whenever it does.