Very simple game that would really benefit for a few extra game mechanics, such as avoiding falling more solid objects (acorns etc.), maybe some insects to avoid on the ground, poison leave to avoid, pick leaves up before they turn brown, squirrels throwing nuts, maybe wind moving the leaves around. I think this deserves a little extra time spent on it and it could be a great fun little game.
I better title screen that reflects the game more would also be good. The current title screen doesn't do the game any favours.