LD24 MuTaTrIs (Updated entry)

MuTaTrIs:
Everyone knows the world-famous Tetris. What if blocks could change over time? What if those blocks were… mutating?
Be careful while making lines, now the rules are changing!
About:
Hey everyone!
First of all, I’d like to apologize for all of those who’d have tried to play my game and got loading errors.
I have now something which should be functional for most recent web browsers.
You can check out my game over here: http://www.ludumdare.com/compo/ludum-dare-24/?action=preview&uid=6851
Enjoy and feel free to comment