The concept with the fish and the balls is very strange but it works well. Fun to build a tower like this, and it was a nice way to combine the actual stacking with the fish placement. It forces you to think in two ways, which makes the gameplay alot more interesting. It would have been nice maybe to indicate the position of the flag before you drop the rock? Now it's a random direction which made planning a bit more random, since you couldn't predict the position the fish had to be in before dropping.