I've gone to town on your Google Doc for the first few paragraphs. As you can see, you can make the same amount of plot move with a considerably smaller word count.
It's obviously some kind of foreshadowing, but you really don't need three sentences talking about someone's cape flaring out. It doesn't make the mystery character interesting.
Another thing that I noticed is that you deliberately hold back the MC's name until someone yells it out, which increases your word count as you keep using "young man" as a placeholder. Again, I don't think it adds any mystery or intrigue to the story.
Watch for redundancies in your writing. If you're referencing the same item/place multiple times in a row (e.g. "alleyway" or "crates"), you can probably take out half of the repeated words without confusing anyone in the slightest.
Also, you don't need to be unnecessarily detailed when describing actions, such as when your character took a jar, tucked it under his arm, and then pulled out a parchment to put in the jar's place. People have plenty of firsthand experience juggling multiple items and their brains will fill in the gaps.
More detailed writing that moves through less plot in the same word count isn't always wrong, but the main problem I see is that you have no shift in voice between the "action", tense part of the chapter, and the more relaxed part after the heist is successfully pulled off. Your action scenes then feel bogged down and fail to immerse the reader in the fast-paced excitement of the moment due to the lack of fast pace.