For a more advanced version of Tetris in HTML5, I suggest you take a look at Francesco Cottone's rendition of it at http://www.kesiev.com/akihabara/ http://www.

For a more advanced version of Tetris in HTML5, I suggest you take a look at Francesco Cottone's rendition of it at http://www.kesiev.com/akihabara/ http://www.kesiev.com/akihabara/ (it's called T-Spin). It makes a pretty darn good at emulating the game mechanics of the best versions of Tetris (namely the arcade version "Tetris the Grand Master", but also the Gameboy, NES and DS version).