I absolutely needed the youtube video to show me the way. The only routes I figured out myself were Fire and (kind of) Wind.
I like the idea and I appreciate that every path had its own unique solution. Dying in one hit is harsh but fair; however the fact that it also resets all progress made is a bit too harsh for a game jam, I feel. Even after I finally managed to completely grow the tree, I failed on the final boss and the idea of going through everything from the start for another shot was a bit too daunting.