Decent but too simplistic for my taste.
This game is not terrible, and I like the idea of being a microscopic organism, but it is too simple for my own taste. It is fine, but I give it a four because of its simplicity. Like the person a few posts below me suggested, you should think about including different types of DNA that give you different skills (like enlarging microbes for example) and add evolution.
It's difficult to dodge other viruses because you drag the amoeba instead of independently moving it with the cursor. I don't like how viruses randomly fade onto the screen after each level because a few times, they appeared dangerously close to me, but it would only annoy me if the amoeba was reset to the center of the screen after each level. I like here the checkpoint is the same level you are currently one if you die. I wouldn't be playing if it reset at level one each time.