Funny idea, sometimes the flowers burnt although i had put the fire out already.
Mechanic wise probably it is still missing a mechanic or two to make it interesting for longer plays. I would definitely say you should have charges on the bucket though as i would not always hit all things at once and then the one item that is still burning set the rest back on fire. And getting back to the next lake takes too long.
Also maybe consider not droping the water while on water i was constantly leaving the pond with an empty bucket, because i hit the key twice. Or mabye use another key.