The game includes 80 missions which grow in difficulty as you advance. First of all, you’ll need to try out the tutorial so as to learn how to play, and once you’ve embraced the basics, you can begin the battle against red cells.
How to play? Draw a line from the green antibody to the red cells in order to cure them and turn them back green. Be sure to stop the connection when it’s no longer necessary in order not to waste all the energy. Sometimes, when you don’t have all the energy, you will need to capture neutral cells in order to travel the distance required. In order to make the game more challenging, there will be a limit of power and the red cells might attack so you need to pay attention to all the elements on the screen and think carefully but quickly about your next move.