great game
really cool idea!
I had fun playing it, nice job on it ^^
You should've added some more hard puzzles, wasn't really anyone that gave any problems :P
You could also add some more elements to make things harder, like mirrors or something like that, and more points which you can't move.
The hardest puzzles were the ones where some dots already was "checked", that made you think in wrong paths :P
Nice job anyways ;)