LTris as a tetris clone: differently shaped blocks are falling down
the rectangular playing field and can be moved sideways or rotated by
90 degree units with the aim of building lines without gaps which
then disappear (causing any block above the deleted line to fall
down).

LTris has three game modes: In Classic you play until the stack of
blocks reaches the top of the playing field and no new blocks can
enter. In Figures the playing field is reset to a new figure each
level and later on tiles and lines suddenly appear. In Multiplayer up
to three players (either human or CPU) compete with each other
sending removed lines to all opponents. And in Demo you can watch
your CPU playing while enjoying a cup of tea!