Oh, that was fun!! No idea how to get even close to the highscore, since the game crashed for me, when I was just at a score of 375, but I really like your game! Great idea on the theme, lovely artstyle and it feels good to play.
Sure, the new cells were too cheap, I never actually got to spending all my DNA, and the [+] button was not completely intuitive, but that is small stuff.
My suggestion: make a selection wheel, for when players click on one of the "ghostly" hex cells around them.