Introduction :

This program is a clone of Tetris™ (Like Columns™, for example) ... It 
is freeware, you can (and should !) play it or distribute it freely.
	The aim of the game is to wipe out a virus colony with an 
infinite set of capsules. The capsules are falling successively in the 
infested bottle. Your job is to align four or more blocks of the same 
color. The row must be horizontal, vertical, or diagonal. When a row 
is created, all the blocks that composed it are destroyed and the 
capsules above them fall down in the bottom of the bottle ...
	Once all the viruses have disappeared, the level increases, 
the new level counts more viruses, and the falling of the capsules is 
quicklier. The game ends when a capsule reaches the top of the bottle .
.. there are 5 different viruses.