Betris for

From fmworks.de:

BETRIS is a semi-logical, semi-action game, where your goal is to quickly arrange falling figures so that they form solid lines, building a pile.

The rules: Seven different shaped blocks fall down the game field one after the other. The object of the game is to keep the blocks from piling up to the top of the game field. To do this, you can move blocks to the left and right, and rotate them as they fall. If you can completely fill in one horizontal line, that line disappears and you get points. If the blocks pile up to the top of the game field, then that's the end of the game. BETRIS is simple, easy-to-understand, but difficult to drag yourself away from!