When you complete a low level goal, it will trickle up to the contributing goals. This affects the counter next to the goal that says how many tasks completed, and it affects the goal chain.
I would like to present the structure of the goals as a hierarchy. Can you update the goals page to do this?
It is already a hierarchy, just not presented as such.
My suggestion is to emulate David Allens Altitudes (50 000 feet, 40k feet, etc).
Lifelong goals on top, with linked goals in the level under, etc.