Cool concept. I really like the little story you have. The fact that I know that I'm a virus gives me a sense of objective, rather than just floating around. I don't know why you gave it the name it has. It's kind of funny but I hope you change it from Geometrical Trigonometrical Circles to something better.
I'm not sure if there is a way to restart once you die, but I couldn't find one. That would be really nice, I don't like reloading the page just to play again, although it's kind of clever because it dramatically increases the views ;)
The colour palet is very nice. It looks really good. But can I suggest a red one, it would make more sense in terms of the story. More of your insides are red rather than blue.
One more thing, I didn't notice any sound. just a simple soundtrack would be nice, but sound effects are really great and add another layer of immersion.
Overall, good work, this is a good concept for a game and with a bit more work it could become something really cool and original. Stick with your story, it's more interesting than just stay inside the circle. Good luck! I'm excited to see what else you'll develop.