I liked the setting and the atmosphere. Blending the player's life with the tree model losing its leaves is an interesting idea that blends story and mechanics well. I liked the music, artwork and cinematic parts that are fitting to the theme. The gradual introduction of the buttons is a good way to learn the controls. I agree with other comments on the fonts being hard to read. Also I tried playing this with a gamepad and I had to switch between keyboard and gamepad for pushing E or left-shift. It would be awesome if there was gamepad support as well.
All in all I think it was a good submission!