This is the ad-free version with the function for random puzzles.
In this little game your task is, to decrease all numbers to zero. Sounds easy? It isn't!
You've got hexes connected to each other. Tap on one and the number from the tapped one and the number of every connected hexagon is also decreased by 1. The difficulty is, that this only works as long as the number is higher than zero, if the number of a connected hexagon is already zero, the tapping on one of the connected hexes doesn't work.
For a better information look at the screenshots and try the game, it as, as always, easy to learn but not so easy to master ;)