CubeMaster 2000

CubeMaster 2000 is the most exciting Tetris clone around. It has combined excellent control with interesting graphics and a great selection of in-game music. You can change the brick patterns to smiley faces, stars or even skulls and the music, interestingly, includes a version of Nirvana's "Smells like teen spirit".

Overall, this can become extremely addictive if you already are a Tetris fan. You'll keep seeing those bricks even with your eyes closed...