You did a wonderful job with your store. Like @Rockpapercopy mentioned, I love that there is a clearly defined niche. I also love your product descriptions! That's usually something merchants skip out on and I really appreciate the effort you put into yours. They are amazing!
Now for some feedback. First, I think your front page can be longer. I scrolled for half a second and that was it-nothing else! You have so much more space to add information about your store. You can add collections, banners with facts, testimonials, and even highlight some products.
Also, as a customer I find it odd and almost suspicious if I do not see enough on the front page. This is because most online stores scroll for quite a while. I think your customer will find it comforting if you have it very scrollable.
Finally, I think your pop-up should ask for an email:
Even if you don't get sales, at least if you get an email you'll have gotten a step further to building an audience and customer base. You can also offer a code in the first email to get a discount (like you have available). Mailchimp is free and you can sign up for an account and set this up pretty easily. I did with my store and it has helped a lot!
Hope that helps.