You have a great plot idea and you're setting yourself up for some good thematic elements, but you need to do a lot of work on characterization, setting, style, diction (word choice), and detail.
Character - Tell us more about Josh and his Dad. Describe all of their important physical features, as well as their character traits.
Setting - I'm not quite sure what time period, city, time of the day, etc. is. It's helpful to elaborate on these. Without them, the reader has to fill in a lot of imagery for themselves, and your story begins to lose color.
Style - Writing in an objective disconnected fashion is hard to pull off. I suggest you make the story a bit more personal. Your point of view shifts around from omniscient, to third person limited, to second person. For starters, I would stick to either first person (I did this, I saw that, etc.) or omniscient. Adding figurative language and changing syntax structures also helps.
Diction - It's hard to give advice for this, but I'm pretty sure that I can provide some insights and helpful hints. First, don't use the same words over and over, unless you had a specific purpose for that. Second, try to find more elaborate or detailed synonyms for words that you're using. Third, spice up your story with adjectives and adverbs. Make sure your story is vivid and descriptive; that's the best way the writer to can connect to the reader.
Detail - I enjoyed the conciseness of your chapters, but it won't hurt to elaborate a little bit. Add a bit more to your story, whether it be developing a side plot, or introducing more characters. Don't hesitate to be a little superfluous; writers often think they are writing a lot, when in fact, a reader can cover a piece of text more than three times faster than a pen.
Anyways, I enjoyed the read, and I like the idea you have here. Keep it up! Oh, and sorry if there are any mistakes in my post.