Nice game and nice game concept.
I like it.
Ok ... i am used to this kind of games, so it was really easy for me to get the right path within some sec / min. (I think i did it in less than 30 min?)
Anyway ... for someone who didn't play this sort of game much and maybe for younger people: nice game!
(Could use a slight bit of better ending, cause this trophy at the end didn't kick me out of my chair)
But as this would be the only worse thing i could tell:
5/5 + 10/10 - nice job! please keep on doing good games.
It's a great puzzler in every aspect, but there is room for improvement, and there should be a level editor, too.
It's just a great game for brain training.