New Zen mode (We all know what that is) and Extreme mode! I've played extreme myself, it's quite a bit of fun, but really hard. Basically, you start out with a few levels of blocks. Every few seconds, another level is added. You have to destroy the blocks before they reach the top. There's a point system, a certain number of points needed to advance to the next round, but instead of moving to a new screen they simply add each new level a little faster. I made it up to about 1,600 points in extreme mode before I lost. There aren't any special blocks, and completely clearing the screen earns an extra 50 points.