I don´t think it needs more elements, just a more compact and focused shot of what you have in the scene already. – A lower camera for instance, on eye height with the snail, maybe the snail a bit closer to the mushrooms and stronger DOF to focus the view onto one or two elements only in the image, while keeping the rest of the elements only as suggestion of the forrest. – Just some thoughts, in case you still want to work on it a bit further. 
