It is a game in which the goal is to clear as many screens of garbage as possible. You have 5 minutes to clear each screen, and if you do, you get a thumbs up. If you get 3 thumbs up's, you level up.
This game can be set to use pentiminoes, triominoes, dominoes, and/or minoes for the pieces. Also, some tetriminoes are of 2 different colors. All the fragments within these tetriminoes will cascade separately. Also, minoes of the same color stick together.
The colors of the tetriminoes can also be changed. The "all-blue" or "all-gray" schemes have their colors very similar.