Tetris Under Three

I decided that my Pacman4Console days are behind me. Now it's all about HTML5. I decided to see how quickly I could make a Tetris clone that could be played on virtually any web-capable device. It took me 2 hours and change, and it's 293 lines of code (JS + HTML + CSS + comments). It's Tetris Under Three. Sorry, it doesn't keep score, the block rotation is a little funky, and it never progresses in speed, but that would add another 7 lines at least, and we can't have that.