Being reborn from a tree was a nice take on the theme. Definitely unique but I can't believe I'm saying this but of all the games I've tried, I think this was too easy. You basically can't die so there's no reason to avoid the spikes and there's no real sense of peril. Healing is plentiful and easily accessed. I didn't really see what the water was for but maybe respawns?
Weirdly the 4 hearts went down from the middle not the end, was that intentional?