I might be stupid, but I felt a bit frustrated by not understanding how the game works, exactly. The tutorial is very clear, but once I'm thrown in the action the viruses don't seem to behave like I expect them to, and I don't feel like there's enough visual feedback for me to learn while doing how they behave. My advice would be to make the viruses move smoothly, so as to give the player a clear idea of where they are moving to. Besides that, I really like the game! It's polished and complete enough to keep you hooked for a long time! And the description of the viruses with the images? So cool and cute and a nice addition that I wasn't expecting. Great job!