I played all the way to the end, after about level 22 I found it more difficult. An entertaining game but I'd much prefer it if the movement of the circle was controlled with arrows or WASD rather than the mouse. On more than one occasion, I moved the wrong direction because when the circle flies across the screen my mouse ends up on the other side of it. Pretty good for a simple game though. I was grateful for the mute button for music because it did get a bit repetitive.