Critical Mass Deluxe

Description of Critical Mass Deluxe program from Softdepia.com:

From the labs of Big Fish Games comes perhaps the most addictive puzzle game ever made...Critical Mass.
Critical Mass is part puzzle game and part action game. The three modes of game play and over 90 levels, will keep you clicking in a never ending quest to reach Critical Mass, and blow all the Atoms to dust.

Critical Mass Deluxe is a "Free to try" program. You can download and try it for an evaluation period.