Graphically pretty and the puzzles are in my view the right difficulty. With just 20 rooms + 1 extra level is not just endless, but backed a while gameplay. For those who do not continue to come somewhere, there is a direct help that I have not tried. And there is even such a thing as a small story.
Finally, the score will be saved automatically, of course. Only an unfinished space you have to start from scratch when in between the game ends. The 1-star review is wrong.