Remember Bubble Bobble? Sure you do. Many of us spent hours shooting colored balls and clearing stage after stage. Circlo is based on this same idea: you shoot balls and try to get at least three of the same color together, so that they disappear from the screen.
The difference is that now the ball structure is in continuous rotation and you have to move around it to find the most appropriate target.
It looks really easy at the beginning, but just wait until the rotation speed increases, and the mouse sensibility rises too, and an extra shooter appears to add more balls… that’s where the real fun starts!