Playing to Learn

  I played a lot of games on playing to learn but I think the most effective learning game for me is called "Brainpop game up."  This game genre is action. This game is about killing bacteria. There are many cells that try to kill the bacteria  but the bacteria spreads a little more. Each cell has a different job of how to kill bacteria. The bacteria was caused by a splinter that was stuck into the thumb. It spreads all around the thumb if not killed. I would like to make a game like that because it is really cool. In my game I would like to put action on it. My questions are, how do they make that game? How did they make the bacteria duplicate?