I think you can get keys from ents. What are fruit good for? Harvesting sex toys, lingerie and food does nothing for me. Too much effort for stuff that is easier to get elsewhere. Same for candles, even if wax is free.

The sticks from the ents give crystal mines. Those give a lot of chests and bathing tubs (and crystals) for harvesting with stamina.

Is there an item generator above the seedling shoes? A high enough pool gives a red shoe seedling, but I did go up to 2 square pool and still only a shoe. Same for ents with the seedling item, this only produces ent nuts. And the crystal mine does not go above bath tubs.

Is there a better output for storage/producers? They have a floaty version of their output and lvl 3-5 produce the same - so for merging you do not need 5 of the lvl 5 but can do with 1 lvl 5 and 4 lvl 3 or so.

My storage buildings reset in cost. I do not know why or how. But lvl 1 started at 5 crystals cost again.