I can't believe it, but this game actually made me laugh out loud.
As I was playing the tutorial, I thought "isn't the strategy to just always send the next number to the smallest circle? That seems very basic."
Then the game told me circle sizes would be hidden during the actual game. That made me smile. It was like the game knew exactly what I was thinking.
My next thought was "well i'll just keep track of them in my head. 3 sums isn't too hard."
Then the game added a very short timer to each turn and I broke out laughing.
I love it.