Maybe my attempt at the water animation is a little off.

What i would love to be able to do in this very beautiful game is:

1)Be able to dig an underground cave system -- even at the current height restrictions this could be possible if you could actually dig into the ground.

2) Being able to dig a trench; for say a mote. and not have it filled with water until you remove the wall of earth you left in place; sort of like digging to Panama Canal.