Good take on the theme, and a cool spin on tetris! I like the physics a lot, and how it changes how I think about placing pieces. I like the full rotation degress too, I think that makes it fun.
It's fun to build up the tetris tower and see how high you can get, and I also like the fact that it becomes un manegable and hard the higher you are.
I think it just needs a touch up on some art, and this would be really addicting to play.
Good job!