tetrix — Tetris-like game with screen graphics
A clone of the Tetris game. Documentation for the commands is
on-screen. The optional argument is an initial delay loop count
between moves; the game tries to default to a reasonable value.
Originally written by Quentin Neill. Visual user interface and
color support by Eric S. Raymond
<firstname.lastname@example.org>. The ncurses version was written in
November 1994. See http://www.catb.org/~esr/tetrix/.