How did I not notice that bug? It's great that you noticed it, thank you. Hearing that you enjoyed the game. As you said, adjusting the circle colors is really important, in my opinion, because it saves us from eye-straining complexity. I'm planning to develop the game for another week. Right now it's a demo, and I'm planning to release the full version in a week. If you want, I can reply to your comment again in a week and let you know.