Great idea for a game! However it soon gets boring for various reasons 1) Advers are very regular so much so you got a 30 second or longer ad after each puzzle 2) Some puzzles are not able to be completed without watching the advert even if you have already solved it, without watching the ad it does not accept your solution 3) No possible way to stop the adverts at all This game would be much better if the developers had concentrated on the game play more and not purely about profit.