I think that if you are going to have a game that you have to half numbers left and right that you shouldn't incorporate odd numbers... It's a great concept but the odd numbers make the solutions inconsistent and more of a guessing game rather than a logic and puzzle game
Just thing. In the tutorial, the last move is to transfer half the points in the circle to other circle. Half of 13 is 6.5 not 6.
It is a good game to play if you want to test your math skills, simple but hard, I still like the concept and the game itself but it is not the type of games I would play casually just for fun or while being bored.