Here's a sneaky tip - if you can get three different microbes filling each other up, they will evolve MUCH faster than if you just left them there to grow themselves. Even just one microbe filling up another will grow the second microbe way faster.
I found a bug :(
At one point I wasn't allowed to go to level 26 because I "didn't meet the requirements", even though I'd finished all 25 previous levels with gold trophies. It said I needed 24 bronze, and even with 25 gold, my counter for bronze and silver were both at 23 for some reason. :/
Bug report - during te battle btween the red and the blue guys and when the blue moved they ran all the way from their end of the screen to mine and off the screen, then the game stalled.