Nice intellectual challenge poorly executed
Whilst the game concept is nice and elegant from the maths perspective, the adverts are borderline intrusive, and worse, don't work as advertised. If you're stuck there's supposedly a hint function, but this needs points to be gained to use. Links to adverts to gain points may (not always) play an advert video, but afterwards you don't get the reward, regardless of how you click out of the advert overlay. There's no apparent way to play the game without adverts either, so I'm suspecting this is purely a marketing app posing as a game with little effort going in on maintenance