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Andrew walked out of his family’s store and stepped into the fresh air. He breathed. His mind was already numb, everything gone except for the most important concerns.

He looked around his town again; he’d been doing that a lot lately, looking at his town before he was leaving. He was going to miss the smells of the different homes, every home having a distinct odor, the constant beating of a blacksmith’s anvil, the cacophony of sailors working, and especially the new faces that walked into the store.

So do you want full critiques, or just comments on this? How many words, and what's the genre?

but in case you want to still start with this scene, here's a few nits. In case you care ...

Nothing really in the first paragraph.

"He looked around his town again; he’d been ("...again; he was doing...") doing that a lot lately, looking (studying instead of looking and delete "at") at his town before he was leaving (delete "was" and make it "before he left."). He was going to miss the smells of the different homes, every home having a distinct odor (maybe just leave this last part out. It might be too repedative after the above), the constant beating of a blacksmith’s anvil, the cacophony of sailors working, and especially the new faces that walked into the store. (this last part was good)

He went (walked instead of "went") back inside. Knowing that his parents were busy all day, he took a hatchet off the wall, along with some dried beef and one of the nicest rifles in town and head(ed) out to hide them with the rest of his supplies."

Hope this helps....