Title: SirTet

Description: A Tetris look-alike - random shapes of four square blocks fall down the playing field. Move and rotate them to create a horizontal line of blocks without gaps. When such a line is created, it disappears, and any block above the deleted line will fall. As the game progresses, the shapes fall faster. Game ends when the stack of shapes reaches the top of the playing field.
This Zune version lets you select any music from your library, provides a new color scheme and splash screen, shorter load time, and in-game pause menu so you can change the music mid-game.
Developer: fastm
Download link:
http://code.google.com/p/sirtet/