I'm sorry about all the things that don't make sense. I started making the game the last two days of the jam and it simply wasn't enough and I had to build it without an ending. I wrote more about the intended idea and ending on the game page if you would like to know more.
The XP was supposed to be used for leveling for more abundance capacity and more siphon and fill power and other powers.
I am happy that at least the voice over wasn't too bad and glad the version of the story was interesting to you :)
And sorry you had to give money to trees :)