Today's game has 75 levels and I solved them in about 15 minutes. If you're having trouble with One Line: Circle & Conquer, switch to these. Once you know the trick, these become so easy!
I had a little trouble with one level because the dots were tightly packed and I was allowed to draw illegal lines between points.
There's one level with 3 stars that I particularly liked.
Hey, this game is totally free.