ColorTetris is a little more than just Tetris. It also includes Pentix, a popular variation of Tetris that's more complicated and more interesting, ColorTetris and SuperTetris.
There are also many block sets to play.
You can use your own sound effects if you like, but the preset sounds will not disturb you while you play. The Background greed can also be changed to your taste.
Outstanding graphic and wonderful background music will bring you to the world of pleasure and fun, to the world of ColorTetris!