Very professional and well constructed game.
I have always been a fan of puzzle game and this is no exception and it was a lot of fun to try and complete the levels.
I only problem was the fact that towards the end it felt more of a skill game due to the amount of close calls we had to make. Even in the walkthrough it looked like lightning was passing through other lightning when it shouldn't.
Overall this is a great game but tone down the difficulty a bit.