Absolutely, disgustingly bad.
The graphics aren't even that good. I mean come on, how hard is it to make blocks look good?!
The sound is just as bad. Hey, I liked the old Tetris theme!! Where'd it go!!!
Overall, this game totally kills the greatest , simplest game EVER made. If you want to pick up something that is addictive and you can just pick it up and play it, get the old Gameboy version.