Lots of potential here I really like the design of the microbes. If the game mechanics improve it could be very addictive. Currently the # of microbes that populate increases too quickly from 3 to 5, making it difficult to play longer than 5 min or 250 points. My suggestions for more dynamic gameplay or paid version: *Make 3 levels of difficulty. Easy (match at 4), medium (5), and hard (6 -current setting). *Make timed version where 1 microbe populates every 5 secs and @150 points it goes to 4 secs and so on. That'd be 5 stars!