This Tetris clone got an interesting gameplay.
You must clear a defined number of lines on each level. Then, as levels progress, new pieces are introduced (pentominoes mainly, but also trominoes), as well as some field garbage at level start.
Also, depending on the height of the garbage you left when completing a level, you can progress 1 or more level directly, stay on the same level, or even fall back to a previous level!
Also the intro is funny with an ST crash simulation. ;)