I really enjoyed how I can attack other cells. I enjoyed how you can buy other cells and upgrade them. I also enjoyed how the white cells work together with the other white cells as teamwork. I wouldn't change anything about this game, because I like the game the way it is, and it is very helpful ,and educational when it comes to biology, physics, and all sciences. I would tell my fellow peers, and classmates, and my teachers that you should definitely play this game, because it is not just for fun it helps you learn, and work through strategies, and I recommend that teachers should use this website for special games like immune defense when it comes to science. I believe that immune defense is one of the best strategy games I ever played. It's a well done made game.