I agree with what others have said... your store looks really great!
If you want nit picky advice though... From what I have heard, 100 items in stock is ideal for showing up in Google searches. Also, having less category sections is better for SEO as well. Also, you could put another line or two in your shop announcement saying what people could use your project bags for. It is not a common item, so some might admire them, but be confused on what they are used for.