Tetris Worlds is an online version of Tetris, and that's pretty much it.
Gameplay: It's Tetris, online or off, it's pretty much the same, except the people who play online are hardcore.
Graphics: It's a fairly flashy game of Tetris, but that really doesn't make the game more fun than a version on your cell phone or GBA.
Sound: This does feature custom soundtracks, which is why it scored well here, but the music that comes with it is dumb and the actual sound effects are cheesy.
Value: You can find the two-pack of games that includes this for $5.
Final Thoughts: Tetris Worlds is a simple game of Tetris, nothing more, nothing less.