All chunks will be same (not the starting area); proof of concept
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
What about them is the same? What are those blue things in your screenshot? Can you include better description?
It's water, you can't complete the game without it.
Sure you can. Probably. if you have AAi.
Or if you have ice ore. But in vanilla without water it's impossible.