Super Blox

SuperBlox is a shareware tetris clone with all the expected mechanics. The main difference this game does is that it has dynamic playing field, meaning specific blocks will at random points in the game will shift up or down in order to add more difficulty or randomness.
Another element that is also added are the addition of bombs, which will be dropped rarely but will help out clear out blocks.

The registered version of this game included full sound and music support (pc speakers only for shareware), support for joystick and mouse, and more.