waterpumps are a bit glitchy when you use the undo button, i've watched my riverbeds fill up more than they ought to be after an undo before.
adore the game. i wish there was an option to start from latter stages of restoration when replaying a level - with like, maybe suboptimal map states for balance? i've been stuck on mountain for ages and am considering going back to floodplain baby land so that i can see all the charming animals again.