Circu.io is one of the latest multiplayer online IO games in the list. It's pretty simple and very interesting for you to play. You have only one mission to accomplish. Try to finish your job to become the fastest player! What you need to do is to eliminate all of the red circles appearing on the screen of Circu.io quickly before they ruin your day. Are you willing to take part in the challenge and check out the first level? Let's experience and explore the own ability right now!