Make cells require water to survive

[hellochar]

What if every cell had a set of "needs"? Right now it's just sugar, but we could also add water. We could even add "stretch" needs (similar to how Anno has base needs + fancy needs), like nutrients, acidity, ph, etc

Pros:

1. makes the game more interesting and more interconnected
2. might make cells feel "more alive"
3. gives a purpose to all this water

Cons:

1. we'd need a way to communicate when water is low. But water resources being on every cell is visual noise. Color change is already used by sugar and might get confusing