How are your reactions this friday? They'll need to be razor sharp if you want to score highly on Zodiac Reactor. It's a simple timing-reaction puzzle game, where you have to hit one of four keys at the right moment as a corresponding element approaches the Zodiac Reactor. It's a simple idea, but if you panic for a split second and lose concentration, you are done for.  It takes a minute to grasp, but the introductory tutorial is great. Check it out!