I very much enjoy this game. Simple, mellow, and the concept for the puzzles were very nice. That said... I might be slow, but I was having issues with the second puzzle and my understanding of the rules. I was under the impression that the number on the circle was the number of connections that circle needed, but, there were a couple that didn't seem to "light up" when given the number of connections as labeled. For instance, the bottom left circle reads "4", but even if I gave it 4 connections, it did not light up. So... I'm a little confused if it's the game or if I misunderstood the rules.