That was a very fun game to play. a bit slow in the beginning, but ramps up quite nicely and satisfyingly once you start getting the doubling upgrades.
One small nitpick though, I think the game would look 200% better if the UI, especially the energy & water UI when you're playing as the root, be transparent instead of fully opaque.
In the beginning where you have to manage your energy more carefully, the large UI is blocking a decent chunk of the bottom right corner of the screen, meaning you won't know whether it's worth it to go down there to get the water you saw as the screen is scrolling upward or not. making it transparent (or semi-transparent) would help a lot on planning ahead and see if the water is worth the energy or not.
It's not so important in the late game where water is everywhere and you don't need to worry as much with your energy, but I thought I point it out since there were moments in my playthrough where I go down the middle and saw there's a good chuck of water to the right that I didn't see.