[supercoder]

Be careful calling it Tetris, the company that holds the rights I think pretty consistently goes after people who violate it's trademark and copyright.

[doodpants]

There's a Tetris clone for Macintosh called Quinn, and at one point its website read:

"Quinn is an implementation of a popular falling-blocks game which, according to the Tetris Company, must not be named here."

[simonlc]

They typically wont bother with small projects like this afaik. I've had a semi popular one going for a while with no contact from The Tetris Company.