In this game you are a doctor and your goal is to protect your patient from viruses and bacterias. You shoot them with a sort of cannon you have in the center clicking on them. However, you cannot kill just anything you want. There'll be an arithmetical question in the center of the screen. Each organism will have an answer on it. You can only kill the one with the correct answer to the question in the center. Organisms will move towards the center. If one of them reaches the center, you lose a life.
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