You've made some good points Fran, but as he said, he won't be able to change it now as it's not digital.

I was thinking one reason they have bridges across several islands instead of across one longer point; maybe they are very poor at building architecture and it's harder for them to build a bridge along a larger span of water. As for the smaller bridges leading to random small islands, I was thinking maybe they're just planks kids put there just for fun (I mean, who wouldn't want to live in a town like that and jump from island to island???). Or maybe the adults like to have some alone time on a not-so-isolated island.