I played the demo of this today, I enjoyed it, and the puzzles are a decent enough difficulty to not be too challenging, whilst not feeling so easy as too make it no challenge at all. The humour within the game was nice as well, I think I might have been playing levels specifically designed for the trial, because The game kept on making jokes referencing the fact that it was a trial.
If I have enough money in the future I might buy it (I'm torn between this and Journey) as it is I don't have the monies