I concur with that the lifequest sounds like the quest of life, or a quest in real life.
The end of the orchestral could fit to a stressful, maybe spooky and distressing situation. Not sure about the beginning nor the middle, I'd imagine those parts were creating the momentum and atmosphere for the end, but it's hard to say.
Did you managed to complete the whole orchestral? The post is over a year old so the picture from your 2nd post is no longer visible and I doesn't look accessible sadly. Interested in hearing the rest.